A modified flexible GnRH antagonist protocol using antagonist early cessation and a gonadotropin step-down approach improves live birth rates in fresh cycles: a randomized controlled trial.

STUDY QUESTION: Can pregnancy outcomes following fresh elective single embryo transfer (eSET) in gonadotropin-releasing hormone (GnRH) antagonist protocols increase using a gonadotropin (Gn) step-down approach with cessation of GnRH antagonist on the day of hCG administration (hCG day) in patients with normal ovarian response? SUMMARY ANSWER: The modified GnRH antagonist protocol using the Gn step-down approach and cessation of GnRH antagonist on the hCG day is effective in improving live birth rates (LBRs) per fresh eSET cycle. WHAT IS KNOWN ALREADY: Currently, there is no consensus on optimal GnRH antagonist regimens. Studies have shown that fresh GnRH antagonist cycles result in poorer pregnancy outcomes than the long GnRH agonist (GnRHa) protocol. Endometrial receptivity is a key factor that contributes to this phenomenon. STUDY DESIGN, SIZE, DURATION: An open label randomized controlled trial (RCT) was performed between November 2021 and August 2022. There were 546 patients allocated to either the modified GnRH antagonist or the conventional antagonist protocol at a 1:1 ratio. PARTICIPANTS/MATERIALS, SETTING, METHODS: Both IVF and ICSI cycles were included, and the sperm samples used were either fresh or frozen from the partner, or from frozen donor ejaculates. The primary outcome was the LBRs per fresh SET cycle. Secondary outcomes included rates of implantation, clinical and ongoing pregnancy, miscarriage, and ovarian hyperstimulation syndrome (OHSS), as well as clinical outcomes of ovarian stimulation. MAIN RESULTS AND THE ROLE OF CHANCE: Baseline demographic features were not significantly different between the two ovarian stimulation groups. However, in the intention-to-treat (ITT) population, the LBRs in the modified antagonist group were significantly higher than in the conventional group (38.1% [104/273] vs. 27.5% [75/273], relative risk 1.39 [95% CI, 1.09-1.77], P = 0.008). Using a per-protocol (PP) analysis which included all the patients who received an embryo transfer, the LBRs in the modified antagonist group were also significantly higher than in the conventional group (48.6% [103/212] vs. 36.8% [74/201], relative risk 1.32 [95% CI, 1.05-1.66], P = 0.016). The modified antagonist group achieved significantly higher implantation rates, and clinical and ongoing pregnancy rates than the conventional group in both the ITT and PP analyses (P < 0.05). The two groups did not show significant differences between the number of oocytes retrieved or mature oocytes, two-pronuclear zygote (2PN) rates, the number of embryos obtained, blastocyst progression and good-quality embryo rates, early miscarriage rates, or OHSS incidence rates (P > 0.05). LIMITATIONS, REASONS FOR CAUTION: A limitation of our study was that the subjects were not blinded to the treatment allocation in the RCT trial. Only women under 40 years of age who had a good prognosis were included in the analysis. Therefore, use of the modified antagonist protocol in older patients with a low ovarian reserve remains to be investigated. In addition, the sample size for Day 5 elective SET was small, so larger trials will be required to strengthen these findings. WIDER IMPLICATIONS OF THE FINDINGS: The modified GnRH antagonist protocol using the Gn step-down approach and cessation of GnRH antagonist on hCG day improved the LBRs per fresh eSET cycle in normal responders. STUDY FUNDING/COMPETING INTEREST(S): This project was funded by grant 2022YFC2702503 from the National Key Research & Development Program of China and grant 2021140 from the Beijing Health Promotion Association. The authors declare no conflicts of interest. TRIAL REGISTRATION NUMBER: The RCT was registered in the Chinese Clinical Trial Registry; Study Number: ChiCTR2100053453. TRIAL REGISTRATION DATE: 21 November 2021. DATE OF FIRST PATIENT'S ENROLLMENT: 23 November 2021.

Detection of chromosome aberrations in 17 054 individuals with fertility problems and their subsequent assisted reproductive technology treatments in Central China.

STUDY QUESTION: How do the types and frequency of chromosome aberrations in couples in central China affect fertility and ART treatment? SUMMARY ANSWER: Men with chromosome aberrations or polymorphisms have an increased risk of semen quality impairment and infertility, and couples affected by reciprocal translocations had a lower pregnancy rate compared with other chromosome aberrations. WHAT IS KNOWN ALREADY: Karyotyping is crucial for patients affected by infertility as chromosome aberrations play an important role in the etiology of male infertility. However, the influence of chromosome aberrations and polymorphisms on sperm motility and morphology remains controversial. Data on ART treatment outcomes in infertile couples affected by chromosome aberrations are insufficient. STUDY DESIGN, SIZE, DURATION: We conducted a retrospective study involving 17 054 patients affected by infertility who underwent karyotyping in our center between January 2020 and May 2022. PARTICIPANTS/MATERIALS, SETTING, METHODS: Karyotyping was performed on 17 054 patients with reproductive failure. All patients were from the central regions of China. The following data were collected from a medical records system using patient identification numbers: couples' ages, history of pregnancy and childbirth, type of infertility, years of infertility, cause of infertility, chromosome karyotypes, semen analysis results, assisted reproductive techniques performed, and treatment outcomes of ART. MAIN RESULTS AND THE ROLE OF CHANCE: The incidence of chromosome aberrations was 2.04%; 2.49% in men and 1.57% in women. By analyzing the relationships between chromosome aberrations/polymorphisms and abnormal semen parameters, we found that there were significantly higher rates of asthenozoospermia, oligospermia, and teratozoospermia among men with Robertsonian translocations and sex chromosomal structural aberrations compared with those with normal karyotypes. Higher rates of asthenozoospermia and teratozoospermia were also observed among men with autosomal reciprocal translocations. The incidence of chromosome aberrations in azoospermic men (13.75%), and in men with cryptozoospermia or severe oligospermia (6.97%) was significantly higher than that in men with mild oligospermia or normospermia (0.88-2.12%). In addition, we found that the progressive movement of sperm is impaired in men with Chromosome 21 polymorphisms compared with men with normal karyotypes (39.46% ± 20.51% vs 48.61% ± 18.76%, P = 0.026). The percentage of morphologically normal forms was lower in the chromosomal polymorphism group than in the normal karyotype group (5.01% ± 2.41% vs 5.59% ± 2.14%, P = 0.001), especially in men with polymorphisms on Chromosome 9 (enlarged Chromosome 9 heterochromatin [9qh+]: 4.48% ± 2.22% vs 5.59% ± 2.14%, P = 0.006; pericentric inversion of Chromosome 9 [inv(9)]: 5.09% ± 3.11% vs 5.59% ± 2.14%, P = 0.008). ART treatment was successful in 36.00% of couples affected by chromosome aberrations. However, couples affected by reciprocal translocations achieved a lower pregnancy rate (24.07%), which may be due to the lower euploidy rates (27.31%) when compared with that in other chromosome aberrations. LIMITATIONS, REASONS FOR CAUTION: First, although the initial cohort was large, chromosome aberrations were identified in a small number of patients. Second, the observational nature of the study design is limiting. Third, the couples affected by infertility in this study were all outpatients that did not undergo identical comprehensive examinations except for karyotyping, leading to the incomplete collection of medical records. Also, the population included in this study mainly focused on couples affected by infertility, which may not be included in the European Association of Urology (EAU) recommendation on male infertility. WIDER IMPLICATIONS OF THE FINDINGS: Men with chromosome aberrations or polymorphisms have an increased risk of semen quality impairment and infertility. Constitutional chromosome analysis is recommended for men affected by infertility and severe oligospermia or azoospermia to facilitate early and appropriate guidance for the most suitable treatment. Carriers of chromosome aberrations can achieve acceptable pregnancy outcomes through IVF. However, couples affected by reciprocal translocations have lower pregnancy rates, and more treatment cycles are needed before a successful pregnancy. A possible explanation may be the fewer euploid embryos obtained. STUDY FUNDING/COMPETING INTEREST(S): This work was supported by Grant 2021YFC2700603 from the National Key Research & Development Program of China. The authors declare no conflicts of interest. TRIAL REGISTRATION NUMBER: N/A.

The depot GnRH agonist protocol improves the live birth rate per fresh embryo transfer cycle, but not the cumulative live birth rate in normal responders: a randomized controlled trial and molecular mechanism study.

STUDY QUESTION: Do cumulative live birth rates (CLBRs) after one complete ART cycle differ between the three commonly used controlled ovarian stimulation (COS) protocols (GnRH antagonist, depot GnRHa (GnRH agonist) and long GnRHa) in normal responders undergoing IVF/ICSI? SUMMARY ANSWER: There were similar CLBRs between the GnRH antagonist, depot GnRHa and long GnRHa protocols. WHAT IS KNOWN ALREADY: There is no consensus on which COS protocol is the most optimal in women with normal ovarian response. The CLBR provides the final success rate after one complete ART cycle, including the fresh and all subsequent frozen-thawed embryo transfer (ET) cycles. We suggest that the CLBR measure would allow for better comparisons between the different treatment protocols. STUDY DESIGN, SIZE, DURATION: A prospective controlled, randomized, open label trial was performed between May 2016 and May 2017. A total of 819 patients were allocated to the GnRH antagonist, depot GnRHa or long GnRHa protocol in a 1:1:1 ratio. The minimum follow-up time from the first IVF cycle was 2 years. To further investigate the potential effect of COS with the GnRH antagonist, depot GnRHa or long GnRHa protocol on endometrial receptivity, the expression of homeobox A10 (HOXA10), myeloid ecotropic viral integration site 1 (MEIS1) and leukemia inhibitory factor (LIF) endometrial receptivity markers was evaluated in endometrial tissue from patients treated with the different COS protocols. PARTICIPANTS/MATERIALS, SETTING, METHODS: Infertile women with normal ovarian response (n = 819) undergoing IVF/ICSI treatment were randomized to the GnRH antagonist, depot GnRHa or long GnRHa protocol. Both IVF and ICSI cycles were included, and the sperm samples used were either fresh or frozen partner ejaculates or frozen donor ejaculates. The primary outcome was the live birth rate (LBR) per fresh ET cycle, and the CLBR after one complete ART cycle, until the birth of a first child (after 28 weeks) or until all frozen embryos were used, whichever occurred first. Pipelle endometrial biopsies from 34 female patients were obtained on Days 7-8 after oocyte retrieval or spontaneous ovulation in natural cycles, respectively, and HOXA10, MEIS1 and LIF mRNA and protein expression levels in the human endometrium was determined by quantitative real-time PCR and western blot, respectively. MAIN RESULTS AND THE ROLE OF CHANCE: There were no significant differences in CLBRs between the GnRH antagonist, depot GnRHa or long GnRHa protocol (71.4 versus 75.5 versus 72.2%, respectively). However, there was a significantly higher LBR per fresh ET cycle in the depot GnRHa protocol than in the long GnRHa and GnRH antagonist protocols (62.6 versus 52.1% versus 45.6%, P < 0.05). Furthermore, HOXA10, MEIS1 and LIF mRNA and protein expression in endometrium all showed significantly higher in the depot GnRHa protocol than in the long GnRHa and GnRH antagonist protocols (P < 0.05). LIMITATIONS, REASONS FOR CAUTION: A limitation of our study was that both our clinicians and patients were not blinded to the randomization for the randomized controlled trial (RCT). An inclusion criterion for the current retrospective cohort study was based on the 'actual ovarian response' during COS treatment, while the included population for the RCT was 'expected normal responders' based on maternal age and ovarian reserve test. In addition, the analysis was restricted to patients under 40 years of age undergoing their first IVF cycle. Furthermore, the endometrial tissue was collected from patients who cancelled the fresh ET, which may include some patients at risk for ovarian hyperstimulation syndrome, however only patients with 4-19 oocytes retrieved were included in the molecular study. WIDER IMPLICATIONS OF THE FINDINGS: The depot GnRH agonist protocol improves the live birth rate per fresh ET cycle, but not the cumulative live birth rate in normal responders. A possible explanation for the improved LBR after fresh ET in the depot GnRHa protocol could be molecular signalling at the level of endometrial receptivity. STUDY FUNDING/COMPETING INTEREST(S): This project was funded by Grant 81571439 from the National Natural Sciences Foundation of China and Grant 2016YFC1000206-5 from the National Key Research & Development Program of China. The authors declare no conflict of interest. TRIAL REGISTRATION NUMBER: The RCT trial was registered at the Chinese Clinical Trial Registry, Study Number: ChiCTR-INR-16008220. TRIAL REGISTRATION DATE: 5 April 2016. DATE OF FIRST PATIENT'S ENROLLMENT: 12 May 2016.

Clinical and genetic analysis of cytochrome P450 oxidoreductase (POR) deficiency in a female and the analysis of a novel POR intron mutation causing alternative mRNA splicing : Overall analysis of a female with POR deficiency.

OBJECTIVE: To characterize the clinical features of a female with P450 oxidoreductase (POR) deficiency and to investigate the underlying mechanisms of POR inactivation. METHODS: The proband was a 35-year-old woman with primary infertility and menstrual irregularity. The reproductive endocrine profile was evaluated. DNA sequencing was conducted for the identification of POR gene mutation. RT-PCR was performed to confirm the impact of the mutation on POR mRNA. A molecular model was built for the structural analysis of mutant POR protein. RESULTS: The evaluation of reproductive endocrine profile revealed elevation of serum follicle-stimulating hormone (11.48 mIU/ml), progesterone (11.00 ng/ml), 17α-hydroxyprogesterone (24.24 nmol/l), dehydroepiandrosterone (6300 nmol/l), and androstenedione (3.89 nmol/l) and decreased estradiol (36.02 pg/ml). Sequencing of the POR gene showed the female was a compound heterozygote of the paternal P399_E401 deletion and a novel maternal IVS14-1G>C mutation. Functional analysis revealed IVS14-1G>C mutation caused alternative splicing of POR mRNA, with the loss of 12 nucleotides in exon 15 (c.1898_1909delGTCTACGTCCAG). Also, the resulting mutant POR protein had a V603_Q606 deletion, which inactivated the nucleotide-binding domain of NADPH in POR protein (K602_Q606). CONCLUSION: The mutation IVS14-1G>C of the POR gene could cause alternative splicing of POR mRNA and dysfunction of the resulting POR protein. Under proper IVF strategy with glucocorticoid therapy and endometrial preparation, females with mild POR deficiency still have the opportunity to have a live birth.

The criteria for optimal down-regulation with gonadotropin-releasing hormone-agonist: a retrospective cohort study.

OBJECTIVE: The objective of this study is to investigate whether the degree of down-regulation using GnRH-agonists is associated with pregnancy outcomes. STUDY DESIGN: This retrospective analysis was performed on 2708 cycles from 2514 patients undergoing down-regulation with the luteal phase long protocol. The serum oestradiol (E2D) and luteinising hormone (LHD) levels, the diameter of the largest follicle (DLFD) and the endometrial-thickness (ENTD) after down-regulation were used to evaluate the degree of down-regulation. One-way analysis of variance with the Bonferroni adjustment, the chi-square test and multivariate logistic regression analyses were used for the statistical analysis. RESULTS: The cumulative clinical pregnancy rates (CCPR) and the cumulative live birth rates (CLBR) were higher in the cycles with E2D < 30 pg/ml (63.7%, OR = 1.405 (1.055-1.870) and 56.8%, OR = 1.372 (1.039-1.813)) and 30-55pg/ml (66.8%, OR = 1.439 (1.104-1.874) and 59.8%, OR = 1.397 (1.080-1.806)) than in those with E2D > 55 pg/ml (62.8% and 54.7%). There was a trend towards lower CCPRs and CLBRs in the cycles with DLFD > 10 mm or ENTD ≥ 6 mm; however, this difference was not significant. CONCLUSION: The degree of down-regulation is associated with ovarian response, pregnancy, and live birth. We propose the following criteria for optimal down-regulation: E2D 30-55 pg/ml, ENTD < 6 mm, and no apparent ovarian activity.

Regulation of endometrial receptivity by the highly expressed HOXA9, HOXA11 and HOXD10 HOX-class homeobox genes.

STUDY QUESTION: Are other HOX genes, in addition to HOXA10, involved in endometrial receptivity? SUMMARY ANSWER: The highly expressed HOXA9, HOXA11 and HOXD10 genes also appear to be involved in endometrial receptivity. WHAT IS KNOWN ALREADY: Within the HOX family of homeobox transcription factor genes are the leading candidates for the regulation of embryonic implantation. A crucial role of HOXA10 in endometrial receptivity has been well established. STUDY DESIGN, SIZE, DURATION: To identify HOX candidate genes, we performed data mining on all 39 human HOX genes in the 'Human body index' gene expression database of normal human tissue. The temporal and spatial expression pattern of four highly expressed HOX genes in the human endometrium was determined. To further investigate the function of these Hox genes, we used a robust in vivo mouse model in which we blocked maternal Hox gene expression. PARTICIPANTS/MATERIALS, SETTING AND METHODS: Analysis of a gene expression profile set in the public domain consisting of 504 samples representing 95 different normal human tissues, showed that in addition to HOXA10, also HOXA9, HOXA11, HOXB6 and HOXD10 mRNA showed increased expression in the human endometrium (16 samples). The temporal and spatial expression pattern of these four HOX genes throughout the menstrual cycle was determined in the endometrium from 27 female patients eligible for IVF-embryo transfer with a normal cycle by quantitative real-time PCR (qRT-PCR), western blot and immunohistochemistry. The role of maternal Hoxa9, Hoxa11 and Hoxd10 was assessed in a mouse implantation model by expression knockdown using RNA interference. Forty mice were transfected with Hoxa9-, Hoxa11- or Hoxd10-specific small hairpin RNA (shRNA) constructs or a vector control by injection into the uterine horn at Day 2 after vaginal plug detection (Day 1) (160 mice in total). The effects were examined by qRT-PCR and western blot at Day 4 and litter sizes counted at Day 9 of pregnancy. MAIN RESULTS AND THE ROLE OF CHANCE: HOXA10, HOXA9, HOXA11 and HOXD10 all showed increased expression during the mid-secretory phase of the menstrual cycle (P < 0.01). Knockdown of Hoxa9, Hoxa11 and Hoxd10 in the murine uterus resulted in significantly reduced average implantation rates (P < 0.01) and, with regard to four Hox target genes, also correlated with a significantly increased empty spiracles homolog 2 (Emx2) and insulin-like growth factor binding protein-1 (Igfbp1), and decreased integrin ß3 (Itgb3) and leukemia inhibitory factor (Lif), expression (P < 0.01). LIMITATIONS, REASONS FOR CAUTION: Menstrual cycle stage was not confirmed by serum hormone analysis. We verified the absence of significant differences in stage-specific expression of the reference genes used in our study (ACTB/Actb and GAPDH/Gapdh) and therefore possible limitations of this approach were minimized. In addition, the translatability of our data from a mouse model to patients needs to be investigated further. WIDER IMPLICATIONS OF THE FINDINGS: We provide evidence that three other HOX genes in addition to HOXA10 are involved in endometrial receptivity, and that part of their function is asserted through several known HOX target genes, suggesting the presence of a central HOX signal transduction pathway.

Progesterone elevation on the day of HCG administration may affect rescue ICSI.

To investigate the relationship between serum progesterone concentration on the day of human chorionic gonadotrophin (HCG) administration and rescue intracytoplasmic sperm injection (ICSI), a total of 9858 patients who underwent IVF or rescue ICSI were retrospectively analysed. The results showed a significant difference in serum progesterone concentration on the day of HCG administration between the IVF group and rescue ICSI group (P < 0.01). Multivariate logistic regression showed that progesterone concentration was positively and significantly associated with rescue ICSI (OR 1.297, 95% CI 1.153-1.460, P < 0.001). Moreover, an increased rescue ICSI rate was associated with progressively higher progesterone concentrations in all cycles. In addition, patients with progesterone >1.5 ng/ml demonstrated a significantly higher rescue ICSI rate compared with patients with progesterone concentration ≤1.5 ng/ml (P < 0.05). In conclusion, elevated progesterone on the day of HCG administration had an adverse effect on oocyte fertilization; thus, greater attention should be paid to these patients in an attempt to avoid fertilization failure, especially when progesterone is >1.50 ng/ml. For the issue of oocytes fertilization, most literatures have found the presence of a negative association between P elevation and fertilization. They suggested that P elevation may only influence the endometrium, leading to impaired endometrial receptivity and had no adverse effect on the fertilization of oocytes. On the contrary, we enrolled 9,858 fresh cycles and found elevated P had an adverse effect on the oocytes fertilization, especially if the P concentration >1.50 ng/mL. It is the first report about the relationship between the rescue ICSI and serum P levels.

Analysis of birth defects among children 3 years after conception through assisted reproductive technology in China.

BACKGROUND: Previous studies inconsistently suggest that assisted reproduction technology (ART) may increase the risk of birth defects in children. METHOD(S): Live birth infants, conceived by in vitro fertilization fresh embryo transfer (IVF), intracytoplasmic sperm injection fresh embryo transfer (ICSI), or frozen-thawed embryo transfer (FET) in Reproductive Center of Tongji Hospital (Wuhan, China) between 1997 and 2008, were followed up at birth and after 3 years. Preterm pregnancy, multiple pregnancy, sex ratio (male/female), congenital malformation were compared. RESULT(S): A total of 4,236 children were born after ART (IVF 2,543, ICSI 908, FET 785). Compared with IVF, the rate of preterm pregnancy and sex ratio in ICSI were lower (p < 0.05); the rate of multiple pregnancy in ICSI and FET were all lower than IVF (p < 0.05). Congenital defects were comparable in all groups at birth. In total, 2,908 children participated in the second follow-up from 34 months to 60 months with an average of 40 months, and the cases of birth defects had doubled (3 years: 5.16%, birth: 2.22%). The birth defect rate in boys conceived through ICSI was significantly higher than the IVF group after 3-year follow-up (ICSI boys: 8.62%, IVF boys: 5.21% [p < 0.05]), even though there was no significant difference at birth. CONCLUSION(S): Compared with IVF, FET may not increase risk of birth defects. Children conceived through ICSI, especially males, had higher rates of congenital malformations that were inapparent at birth. So longitudinal monitoring may provide insights into the risks of ART.

Effect of the site of assisted hatching on vitrified-warmed blastocyst transfer cycles: a prospective randomized study.

PURPOSE: To assess the effect of assisted hatching (AH) site on the clinical outcomes in vitrified-warmed blastocyst transfer cycles. METHODS: A total of 160 women who underwent vitrified-warmed blastocyst transfer cycles were randomized to either the ICM group (AH performing at the site near the inner cell mess, ICM), or the TE group (AH performing at the site opposite to the ICM). AH with laser zona drilling was performed 20 or 30 min after thawing once the ICM can be detected. Clinical pregnancy rate, implantation rate, live birth rate and the occurrence rate of monozygotic twins (MZT) pregnancy after transfer of these two groups were compared. RESULTS: No significant difference was found in the clinical pregnancy rate (63.8% vs. 67.5%), implantation rate (51.7% vs. 53.6%) and live birth rate (57.5% vs. 62.5%) between the ICM group and the TE group. The occurrence rate of MZT was comparable between the two groups (3.9% vs. 5.6%). CONCLUSIONS: The site of assisted hatching has no influence on the implantation, pregnancy and live birth rate in human vitrified-warmed blastocyst transfer cycles.

[Effect of domestic highly purified urinary follicle stimulating hormone on outcomes of in vitro fertilization-embryo transfer in controlled ovarian stimulation].

OBJECTIVE: To investigate the effect of domestic urine-derived high-purity follicle- stimulating hormone (HP-FSH, Lishenbao) on the outcome of in vitro fertilization(IVF) embryo transfer (ET) in controlled ovarian stimulation (COS). METHODS: From 1 September 2010 to 31 March 2011, total of 3178 infertility patients from 14 Reproductive Center with IVF or intracytoplasmic sperm injection (ICSI) indications who accepted first IVF or ICSI cycle were studied retrospectively. Their causes of infertility include all infertility factors except ovulatory dysfunction infertility and uterine factor infertility. The only long luteal phase gonadotropin-releasing hormone agonist (GnRH-a) protocol was included. Patients were divided into 2 groups according to the type of follicle-stimulating hormone (FSH) agents used: 1932 cases in HP-FSH group and 1246 cases in recombinant FSH (rFSH)group. Patients in both groups were combined with human menopausal gonadotropin (hMG) at doses of 150 U when follicle with diameter reached to 14-16 mm. When 3 dominate follicle with diameter reached 18 mm, hCG at dose of 5000 to 10 000 U or recombinant hCG at dose of 250 µg was administered by intramuscular injection. After 34 to 36 hours, oocytes were obtained guided by ultrasound, then IVF-ET were underwent in their Reproductive Center. The primary endpoint was comparison of live birth rate between the two groups. The secondary endpoints were comparisons of clinical pregnancy rate, miscarriage rate, and implantation rate, as well as COS and IVF outcome between the two groups. RESULTS: (1) There were significantly differences in baseline characteristics of the patients between two groups. The mean age was elder(32 ± 4 versus 30 ± 4, P < 0.01) , the infertility duration was longer (5 ± 4 versus 5 ± 3, P < 0.01) , and antral follicle count (AFC) was less (11 ± 5 versus 13 ± 7, P < 0.01) in patients of HP-FSH group compared with those in patients of rFSH group. (2) As compared with rFSH, the total doses of gonadotropin needed was (2348 ± 1011) U in HP-FSH group versus (2022 ± 659) U in rFSH group, the number of oocytes 13 ± 6 in HP-FSH group and 14 ± 7 in rFSH group, the rate of embryo frozen cycle of 66.30% (1281/1932) in HP-FSH group and 74.88% (933/1246) in rFSH group, which all reached statistical difference (P < 0.01). However, there were no significant different implantation rate [30.49% (1111/3644) versus 32.45% (737/2271)] between two groups. The other clinical parameters did not show significant difference, including clinical pregnancy rate per started cycle [41.61% (804/1932) versus 41.97% (523/1246) ] , clinical pregnancy rate per ET cycle[46.58% (804/1726) versus 48.47% (523/1079)], live birth rate per started cycle[34.21% (661/1932) versus 34.19% (426/1246)], live birth rate per ET cycle [38.30% (661/1726) versus 39.48% (426/1079)], miscarriage rate[13.6% (109/804) versus 16.4% (86/523)], and moderate/severe ovarian hyperstimulation syndrome (OHSS) rate [5.80% (112/1932) versus 7.78% (97/1246)](P > 0.05).(3) Treatment cost: the cost of gonadotropins needed for the patients in HP-FSH group was lower than that in rFSH group (4005 ± 1650 versus 6482 ± 2095, P < 0.01). CONCLUSION: In IVF/ICSI treatment cycles, domestic HP-FSH has similar live birth rate and lower financial burden when compared with rFSH.

Effect of male age on the outcome of in vitro fertilization: oocyte donation as a model.

PURPOSE: To assess the influence of male age on the outcome of oocyte donation cycles. MATERIALS AND METHODS: A total 103 oocyte donation cycles of 70 couples (male aged 26 to 57) were examined, all of which were performed with conventional in vitro fertilization using fresh ejaculation sperm. Main outcome measures were fertilization rate, clinical pregnancy, live birth rates and pregnancy loss. RESULTS: A total 122 cryopreserved embryo transfer were performed, resulting in 34 cycles resulted in clinical pregnancy and 27 live births. No significant correlation was found between male age and fertilization rate. No significant difference was found in male age between the patients who achieved clinical pregnancy and live birth and those who did not. All the pregnancy loss occurred in cycles where the male was older than 37, however, when the cycles were divided into two groups according to whether or not male age older than 37, no statistically significant difference was not found in pregnancy loss rate. CONCLUSIONS: Aging of the male has no significant impact on fertilization, pregnancy or live birth in oocyte donation cycles, but may be associated with pregnancy loss.

Selection and vitrification of embryos with a poor morphological score: a proposal to avoid embryo wastage.

Embryos with a poor morphological score at cleavage stage are usually discarded because they are considered unsuitable for transfer and cryopreservation. This study examined the in vitro blastocyst development after extended culture of these embryos and the clinical outcomes after transfer of these blastocysts in warming cycles. A total of 597 blastocysts (24.7%) were obtained from 2421 embryos with low morphological scores after extended culture. One hundred and sixty blastocysts (6.6%) with optimal morphology were vitrified. Embryo utilization rate was increased from 30.8% to 32.6%. After warming, 61 out of 92 blastocysts (66.3%) survived and were transferred in 44 cycles. The clinical pregnancy rate and the implantation rate were 40.9% (18/44) and 32.8% (20/61) respectively. Thirteen healthy babies were born, and 5 pregnancies aborted spontaneously. Our study suggested that some blastocysts derived from embryos with a poor morphological score can be successfully vitrified and give rise to live births. Selection and vitrification of viable embryos after extended culture of embryos with a poor morphological score may constitute a proposal to avoid embryo wastage.

[MicroRNA expression and its role in the cell cycle regulation in decidualized endometrial stromal cells in vitro].

OBJECTIVE: To study microRNA (miRNA) expression and role of cell cycle regulation in decidualized endometrial stormal cells (ESC) in vitro. METHODS: ESC was induced decasualization in vitro and matched with non-decidualized cells as controls. The expression repertoire of miRNA was measured by microarray chip and was validated by real-time PCR. Flow cytometry was used to identify ESC cycle during decidual reaction in vitro and after miRNA222 inhibitor was transfected into it. RESULTS: (1) Between decidualized and undecidualized stromal cells, there were 49 miRNAs significantly different expression by microarray chip, including 16 miRNA up-regulation and 33 miRNA down-regulation.hsa-miR-27b, 30c, 143, 101, 181b, 29b, 30d, 507, 23a, 222, 221 exhibited significantly differential expression between decicualized and undecidualized stromal cells by real-time PCR (P < 0.05). (2) After miRNA222 inhibitor (NC-FAM) transfection to decidual ESC, ESC were cultured by FBS medium for 24 hours, the rate of transfection was 70%. ESC were transfected with miRNA 222 inhibitor and cultured for 48 hours, the percentage of ESC at S-phase of (6.2 ± 0.7)% were significantly lower than (10.9 ± 0.8)% in control group (P < 0.05);the percentage of ESC at G(0)/G(1) phase increased at transfection group [(77.5 ± 1.3)% vs. (73.0 ± 1.6)% at control group], but there was no significant difference (P > 0.05). Decasualization ESC were transfected with miRNA 222 inhibitor and cultured for 48 h, the percentage of ESC at S-phase was (3.3 ± 0.6)% in transfection group, which were significantly lower than (7.8 ± 0.9)% in control group (P < 0.05). The percentage of ESC at G(0)/G(1) phase was (80.7 ± 1.6)% in transfection group and (74.9 ± 1.1)%. In control group, which did not reached statistical difference (P > 0.05). CONCLUSION: miRNA was involved in ESC decidual process in vitro by regulating cell cycle.

Impact of reciprocal translocation t (18; 21) on male infertility and embryo development: lessons from an oocyte-donating ICSI cycle.

PURPOSE: To report the outcome of intracytoplasmic sperm injection (ICSI) cycles of an oligozoospermic man with reciprocal translocation. METHODS: Two ICSI cycles were given to a 29-year-old man with severe oligozoospermia and reciprocal translocation t(18;21)(p11;q21) and his wife. In the first cycle, no sperm were found in his semen and all 15 oocytes retrieved were donated to another infertile couple suffering from oligozoospermia and premature ovarian failure. In the second cycle, sperm from the husband's ejaculate were used to fertilize 13 retrieved oocytes. RESULTS: Eleven embryos were acquired and a healthy girl was born in the oocyte-donated ICSI cycle. In the second cycle, 6 embryos were acquired and only biochemical pregnancy was achieved after three times of embryo transfer. CONCLUSIONS: By the unusual oocyte-donating ICSI procedures, impact of the new reported reciprocal translocation t (18; 21) (p11; q21) on male fertility and embryo development was suggested.

Association of controlled ovarian hyperstimulation treatment with down-regulation of key regulators involved in embryonic implantation in mice.

The debate exists whether or not gonadotropin-releasing hormone (GnRH) analogs used in controlled ovarian hyperstimulation (COH) impair endometrial receptivity. Homeobox A11 (Hoxa11), Meis homeobox 1 (Meis1), cadherin 1 (Cdh1), and catenin beta 1 (Ctnnb1) are well known to be involved in successful implantation. In this study, the endometrial expression of Hoxa11, Meis1, Cdh1, and Ctnnb1 during the peri-implantation period was investigated in an in vitro fertilization (IVF) mouse model by real-time RT-PCR and Western blot to evaluate the relationship between Hoxa11, Meis1, Cdh1, and Ctnnb1 expression and the impact of the COH on endometrial receptivity. The mimic COH protocols included GnRH agonist plus human menopausal gonadotropin (HMG) (GnRH agonist group), GnRH antagonist plus HMG (GnRH antagonist group), and HMG alone (HMG group). The expression levels of Hoxa11, Meis1, Cdh1, and Ctnnb1 mRNA and protein were decreased in all of the COH groups. The expression levels of Hoxa11 and Ctnnb1 were the lowest in the GnRH agonist group, and those of Meis1 and Cdh1 were lower in the GnRH analog groups than the HMG group. There were positive correlations between the expression of Hoxa11 and Ctnnb1, as well as the expression of Meis1 and Cdh1 among all the groups. In conclusion, the COH protocols, particularly with GnRH analogs, suppressed Hoxa11, Meis1, Ctnnb1 and Cdh1 expression, in mouse endometrium during the peri-implantation period. Our data reveal a novel molecular mechanism by which the COH protocols might impair endometrial receptivity.

Developmental Potential and Clinical Value of Embryos with Abnormal Cleavage Rate.

To investigate the developmental potential and clinical value of embryos with abnormal cleavage rate, a retrospective analysis was performed on 66 635 2-prokaryotic (2PN) and 1-pronuclear (1PN) embryos. The embryos were given conventionally in vitro fertilization (IVF) treatment and continuously cultured on the day 3 (D3) at the Reproductive Medicine Center, Tongji Medical College, Huazhong University of Science and Technology from January 2016 to December 2017. The embryos were separated into the day-2 (D2) undivided group with 106 cases, the arrested development group with 3482 cases, the blastomere reduction group with 541 cases, and the control group with 62 506 cases, respectively. The blastocyst utilization rates of these three abnormal groups were 2.83%, 10.86% and 6.84%, respectively, which were significantly different from that in control group (39.46%). Furthermore, 2 cases of anabiosis and 1 case of live birth were found in D2 undivided group. In arrested development group, there were 55 cases of anabiosis, 11 cases of clinical pregnancy in single-embryo transplantation (including 6 cases of live birth), and 25 cases of clinical pregnancy in combination with one normal embryo transplantation (including 23 cases of live births and 15 cases of dizygotic twins under B-ultrasound). There were 13 case of anabiosis in blastomere reduction group: there was 1 case of single embryo transplantation and clinical pregnancy was obtained; there were also 6 cases of clinical pregnancy in combination with one single normal embryo transplantation (including 5 cases of live births and 2 cases of dizygotic twins under B-ultrasound). In conclusion, embryos with abnormal cleavage rate still have the potential to continue to develop, and have certain blastocyst utilization rate and live birth.

Assisted conception does not increase the risk for mother-to-child transmission of hepatitis B virus, compared with natural conception: a prospective cohort study.

OBJECTIVE: To determine whether assisted conception increases the risk for mother-to-child transmission of hepatitis B virus (HBV) infection compared with natural conception. DESIGN: Prospective cohort study. SETTING: Research laboratory. PATIENT(S): A total of 305 children, 176 born with assisted conception and 129 born with natural conception, were born to a total of 251 hepatitis B surface antigen- (HBsAg-) positive women. INTERVENTION(S): None. MAIN OUTCOME MEASURE(S): The seropositive rates of HBsAg in children at birth and HBV infection rates at 9-15 months of age. RESULT(S): Overall, 7.5% (23/305) of children were HBsAg-positive at birth. The rate of HBsAg-positive children at birth did not significantly differ between children in the assisted conception group compared with those in the natural conception group (6.3% [11/176] vs. 9.3% [12/129]). Multivariate logistic regression analysis showed that conception method is not related to the rate of HBsAg-positive children at birth. All children who were positive for HBsAg at birth and were followed up for 9-15 months became negative for HBsAg after hepatitis B immunization. CONCLUSION(S): Assisted conception does not increase the risk for mother-to-child transmission of HBV compared with natural conception.

Association between TSH Level and Pregnancy Outcomes in Euthyroid Women Undergoing IVF/ICSI: A Retrospective Study and Meta-analysis.

The aim of this study was to determine the association between thyroid-stimulating hormone (TSH) level and pregnancy outcomes in euthyroid women undergoing in vitro fertilization (IVF)/intra-cytoplasmic sperm injection (ICSI). A total of 1185 women were enrolled in the retrospective study, and 12 studies with a total of 6624 women were included in the meta-analysis (including the data of the present retrospective study). Participants in the retrospective study were divided into two groups in terms of their serum TSH levels: TSH ≤2.5 mIU/L group (n=830) and TSH >2.5 mIU/L group (n=355). They were monitored for the status of clinical pregnancy or miscarriage. In the TSH ≤2.5 mIU/L group, 441 (53.1%) women achieved clinical pregnancy, while 48 (5.8%) had early pregnancy loss and 12 (1.4%) had ectopic pregnancy. In the TSH >2.5 mIU/L group, 175 (49.3%) women achieved clinical pregnancy, while 21 (5.9%) had early pregnancy loss and 3 (0.8%) had ectopic pregnancy. No significant differences were observed between the two groups in pregnancy outcomes (P=0.126, P=0.512, P=0.297). The meta-analysis also revealed no significant difference in the clinical pregnancy rate and the miscarriage rate between women with serum TSH ≤2.5 mIU/L and those with serum TSH >2.5 mIU/L. In conclusion, high TSH levels (TSH level >2.5 mIU/L) did not affect clinical pregnancy rate or increase miscarriage rate in euthyroid women undergoing IVF/ICSI.

Myeloid ecotropic viral integration site 1 (MEIS) 1 involvement in embryonic implantation.

BACKGROUND: The HOXA10 homeobox gene controls embryonic uterine development and adult endometrial receptivity. The three-amino-acid loop extension (TALE) family homeobox genes like myeloid ecotropic viral integration site 1 (MEIS) provide enhanced target gene activation and specificity in HOX-regulated cellular processes by acting as HOX cofactors. METHODS AND RESULTS: Analysis of an Affymetrix data set in the public domain showed high expression of MEIS1 in human endometrium. MEIS1 expression was confirmed during the human menstrual cycle by RT-PCR and in situ hybridization and was increased during the secretory compared with proliferative phase of the cycle (P = 0.0001), the time of implantation. To assess the importance of maternal Meis1 expression in a mouse model, the uteri of Day 2 pregnant mice were injected with Meis1 over-expression or small interfering RNA (siRNA) constructs. Blocking Meis1 expression by siRNA before implantation significantly reduced average implantation rates (P = 0.00001). Increased or decreased Meis1 expression significantly increased or decreased the expression of integrin beta3, a transcriptional target of HOXA10 and an important factor in early embryo-endometrium interactions (P = 0.006). Manipulating Meis1 expression before implantation also dramatically affected the number of pinopodes, uterine endometrial epithelial projections that develop at the time of endometrial receptivity. CONCLUSIONS: The results suggest that in mouse, meis1 contributes to regulating endometrial development during the menstrual cycle and establishing the conditions necessary for implantation.

Effect of Bushenantai recipe on the expression of endometrial LIF in mice with embryonic implantation dysfunction.

In order to observe the effect of Bushenantai recipe on the expression of endometrial leukemia-inhibitory factor (LIF) in mice with embryonic implantation dysfunction (EID), 120 Kunming mice post coition were randomized into three groups: normal control group, model group and traditional Chinese medicine group (TCM group) (n=40 in each group). Uterus was collected on the pregnancy day (Pd) 4, 5, 6 after an intravenous injection of Evan's blue. The endometrium was dyed by Evan's blue and the mean points of response were observed on Pd 5. The expression of LIF mRNA and protein was detected by RT-PCR and immunohistochemistry respectively and analyzed statistically by image system. The results showed that the number of implantation sites in model group was remarkably less than in normal control group and TCM group. There was no significant difference between normal control group and TCM group. The expression of LIF mRNA and protein in model group was delayed. Bushenantai recipe could increase the expression of LIF mRNA and protein in endometria of mice with EID. It was suggested that Bushenantai recipe could improve embryo implantation of mice with EID by promoting the endometrial LIF expression and endometrial decidualization.