Cut-off value for anti-Müllerian hormone in the diagnostic criteria for polycystic ovary syndrome in the Japanese population.

AIM: To establish cut-off values for anti-Müllerian hormone (AMH) and antral follicle count (AFC) in the diagnostic criteria for polycystic ovary syndrome (PCOS) applicable to the Japan Society of Obstetrics and Gynecology (JSOG) 2024 criteria and the Rotterdam/International Evidence-Based Guideline for the assessment and management of PCOS (IEBG) 2023 criteria based on a nationwide survey, respectively, taking into account age, assays, and structure of the diagnostic criteria. METHODS: Data were collected for 986 PCOS cases and 965 control cases using a national survey in Japan and used to establish cut-off values for AMH and AFC. RESULTS: Serum AMH levels were significantly higher in the PCOS group compared to the control group. Serum AMH showed a significant negative correlation with age and significant positive correlation with AFC in both groups. In multiple regression analysis, serum AMH level was independently affected by AFC and total testosterone. AMH cut-off values suitable for the JSOG 2024 criteria and the Rotterdam/IEBG 2023 criteria were separately established for the 20-29 and 30-39 years of age groups, respectively, and for Access, Lumipulse and Elecsys/ECLusys, respectively. AFC cut-off values suitable for the JSOG 2024 criteria and Rotterdam/IEBG 2023 criteria were also established separately. AFC exhibited statistically greater variability than AMH. CONCLUSION: The serum AMH level is the biochemical representation of ovarian findings in PCOS and considered objective and highly reliable. Therefore, it could serve as a surrogate for AFC as a marker of polycystic ovarian morphology in diagnostic criteria.

Case-based survey: The impact of breast-cancer treatment on fertility in Japan.

AIM: To assess the impact of breast-cancer treatment on fertility. METHODS: We conducted a retrospective, case-based survey of treatments administered for infertility and pregnancy outcomes after patients underwent treatment for breast cancer. Surveys were distributed to breast oncology facilities and reproductive endocrinology and infertility (REI) facilities. RESULTS: As high as 60% of the pregnancies in women under the age of 35 years occurred spontaneously. Additionally, the fertility rates decreased as age increased (under 35 years of age: 40%, 35-39 years of age: 21%, 40-44 years of age: 10%, respectively). In women who became pregnant after treatment for breast cancer, conception was achieved within 1 to 3 years after beginning to try for pregnancy. CONCLUSIONS: After treatment for breast cancer, women can expect spontaneous pregnancy, especially if they are under 35 years of age. It is important for patients 35 years of age and older to commence assisted reproductive technology in a timely manner when pursuing fertility after treatment for breast cancer.

Clinical outcomes of microdissection testicular sperm extraction and intracytoplasmic sperm injection in Japanese men with Y chromosome microdeletions.

PURPOSE: We investigated the clinical results of Japanese men with Y chromosome microdeletions. METHODS: This study retrospectively examined 2163 azoospermic or severe oligozoospermic patients. We investigated the frequency of azoospermia factor (AZF) deletions and sperm retrieval rate (SRR) by microTESE in patients with these deletions, then analyzed the ICSI outcomes. RESULTS: Azoospermia factor deletions were found in 201 patients. SRR was significantly higher than that of the control group (74.0% vs 20.4%, P < .001). Thirty-three couples underwent ICSI using testicular spermatozoa retrieved by microTESE, and eight couples underwent ICSI using ejaculatory spermatozoa. The fertilization rate and clinical pregnancy rate per embryo transfer cycle were significantly higher in the ejaculatory group than that of the testicular group (66.4% vs 43.7%, P < .001, 53.3% vs 24.7%, P = .03, respectively). When compared with the control group, the fertilization rate was significantly lower in the testicular group with AZFc microdeletions (43.7% vs 53.6%, P < .001). CONCLUSIONS: Our study highlights that although microTESE in azoospermic men with AZFc microdeletions led to a higher SRR, ICSI outcomes of these men were worse than that of men without AZF deletions, even if testicular spermatozoa were retrieved.

[Promotion of Equal Access to Medical Services for Children, Adolescent and Young Adult(CAYA)Cancer Patients with Reproductive Problems-A Nationwide Expansion of the Regional Oncofertility Network in Japan].

OBJECTIVES: Fertility preservation is important for Children, Adolescent and Young Adult(CAYA)cancer patients. Although a regional oncofertility network was established in Japan in 2012, regional inequality persists. This study was aimed at expanding the oncofertility network throughout Japan. METHODS: Oncologists, reproductive medicine specialists, and administrative officials from 24 regions, currently without a regional oncofertility network, conferred to discuss problems and strategies for network expansion. RESULTS: Regional oncofertility networks had already been established in 4 of 24 regions. Consultation and support and a collaboration system between facilities and individual doctors were found in 13 and 14 regions, respectively. Regarding which organization should lead the network operation, the regions(number)chose the prefecture (10), prefectural cancer centers(10), and OB/GYN department of hospitals specializing in cancer treatment(9). Obstacles to establishing a regional oncofertility network were the lack of manpower(21), budget(19), know-how(16), and specialists( 12). DISCUSSION: CAYA cancer patients need equal access to oncofertility networks, and a public support system is essential for preserving the fertility of cancer patients. We should organize a oncofertility network in association with prefectural administration. Medical staff training and supply of materials using the Oncofertility Consortium Japan system are required to promote the oncofertility network throughout Japan.

A tilting embryo culture system increases the number of high-grade human blastocysts with high implantation competence.

Human embryos normally experience mechanical stimuli during development in vivo. To apply appropriate stimuli to embryos, this study group developed a tilting embryo culture system (TECS) and investigated whether it could improve the grade of fresh human embryos compared with a control static culture system. A total of 450 retrieved oocytes from 32 IVF or intracytoplasmic sperm injection cycles of 32 women were cultured for 5-6 days. Oocytes were divided randomly into TECS and control groups and then were inseminated in vitro. All embryos were evaluated at days 3 and 5 using standard grading criteria for embryo quality. The rates of fertilization per mature oocyte and high-grade cleavage-stage embryo formation in the TECS group were similar to those in the control group. The rates of blastocyst formation and of blastocysts graded 3BB or higher at day 5 were significantly higher in the TECS group than those in the control group: 45.3% (67/148) versus 32.1% (51/159) (P=0.018) and 29.1% (43/148) versus 17.6% (28/159) (P=0.018), respectively. The TECS group produced more high-grade blastocysts than the control group. Embryo movement or mechanical stimulation during embryo culture may be beneficial for human embryonic development.

Gynecologic abscess: CT-guided percutaneous drainage.

A 42-year-old woman with recurrent bilateral endometrial ovarian cystoma presented with fever and pelvic pain caused by a tubo-ovarian abscess (TOA), which was resistant to several varieties of intravenous and oral antibiotics for 2 weeks (Case 1). Computed tomography (CT)-guided diagnostic aspiration for a rapid enlarged right ovarian cystoma through a transabdominal route confirmed that it had developed into a TOA. Subsequent percutaneous abscess drainage (PAD) and irrigation for 3 days were successful. One-year follow-up revealed no recurrence of TOA. A 58-year-old woman with recurrent cervical cancer after external radiation therapy (RT) presented with fever, confusion and tremor caused by pyometra (Case 2). Since transvaginal drainage was impossible due to cervical os obstruction, the patient had undergone CT-guided transabdominal PAD and irrigation for a month. Thereafter, the clinical findings improved and a tracheloplasty was performed to prevent recurrence. CT-guided PAD may be a useful treatment option for gynecologic abscess as a diagnostic aspiration, a temporizing procedure until surgery, or an alternative surgery.

Pregnancy rate, multiple pregnancy rate, and embryo quality: Clues for single blastocyst transfer from double blastocyst transfer in an unselected population.

Objective: Minimizing multiple pregnancy is a priority in assisted reproduction. As implantation rates are critical to success and reduce multiple pregnancy, we investigated whether blastocyst grade determined implantation rate following double blastocyst transfer in unselected cases. Materials and Methods: We studied 69 three-cleavage stage embryo transfers and 64 two-blastocyst transfers. Two blastocysts, or one when two blastocysts were not available, were transfered after evaluating the grade of blastocysts. The difference in pregnancy and implantation rates to patient age, the number of retrieved oocytes and grade of blastocysts were analyzed. Results: Blastocyst and grade 3AA rates per fertilized egg were 50.3% and 26.0%, respectively. Following two-blastocyst transfer, pregnancy rate per transfer, implantation rate per embryo, and multiple pregnancy rate per pregnancy were 39.1%, 26.5%, and 24.0%, respectively. Two-blastocyst transfer achieved implantation more often than three-cleavage-stage embryo transfer, but did not reduce multiple pregnancy. Pregnancy, implantation, and multiple pregnancy rates did not reflect maternal age. Higher pregnancy and implantation rates per transfer were attained for with six or more oocytes retrieved or transfer of two-blastocyst graded 3AA or higher especially when two or more blastocysts graded 3AA or higher are available, but the latter showed a high multiple pregnancy rate (38.5%). Conclusions: Single embryo transfer could be carried out when two or more blastocysts of grade 3AA or higher have been developed. (Reprod Med Biol 2005; 4: 153-160).

Identification and characterization of extracellular matrix metalloproteinase inducer in human endometrium during the menstrual cycle in vivo and in vitro.

Extracellular matrix metalloproteinase inducer (EMMPRIN) participates in the breakdown of the extracellular matrix (ECM) by augmenting matrix metalloproteinase (MMP) expression. In the present study, we identified and characterized the menstrual cycle-dependent expression of EMMPRIN in human endometrium in vivo. At the proliferative phase of the menstrual cycle, EMMPRIN was detected in glandular epithelium of the basal layer in endometrium. In addition, at the superficial region of the functional layer, EMMPRIN was expressed in stroma but not glandular epithelium. At the secretory phase, EMMPRIN was found in both stroma and glandular epithelium of the functional layer and glandular epithelium of the basal layer. Furthermore, EMMPRIN colocalized with MMP-1/collagenase-1 in the glandular epithelium in vivo. Western blot analysis of tissue from the functional layer showed that EMMPRIN species with molecular weights of approximately 35 and 47 kDa were detected at the proliferative phase, whereas approximately 35- and 51-kDa EMMPRIN species were predominantly expressed at the secretory phase. In addition, the variant EMMPRIN molecules were found to differ in glycosylation. On the other hand, EMMPRIN was constitutively produced in primary cultured endometrial stromal and glandular epithelial cells. The production and glycosylation of EMMPRIN in the stromal cells were augmented by progesterone at the posttranscriptional and posttranslational stages, respectively. These results suggest for the first time that EMMPRIN is expressed in human endometrium during the menstrual cycle and that its expression and glycosylation are augmented by progesterone. Moreover, EMMPRIN may be involved in ECM breakdown at the interface between endometrial cells and ECM by using EMMPRIN-bound MMP-1.

Indoleamine 2,3-dioxygenase: distribution and function in the developing human placenta.

Studies in mice have suggested that the placenta is protected from immune rejection by maternal T cells by means of localised indoleamine 2,3-dioxygenase dependent depletion of tryptophan. To determine whether such mechanisms might operate in the human placenta, we have studied the physiological importance of human placental indoleamine 2,3-dioxygenase immunohistochemically and functionally. Indoleamine 2,3-dioxygenase is detectable immunohistochemically from day 6 human blastocysts and thereafter throughout pregnancy in syncytiotrophoblasts, extravillous cytotrophoblasts and macrophages in the villous stroma and in the fetal membranes. Interferon-gamma added to villous explants markedly stimulates indoleamine 2,3-dioxygenase protein expression in macrophages. Indoleamine 2,3-dioxygenase-mediated tryptophan degradation in the first trimester villous and decidual tissue explants is stimulated by interferon-gamma and inhibited by 1-methyl-tryptophan (an inhibitor of indoleamine 2,3-dioxygenase). Peripheral blood mononuclear cell proliferation is controlled by indoleamine 2,3-dioxygenase-mediated tryptophan degradation. These results suggest the cellular basis of a mechanism present at the human maternal-fetal interface involved in regulating the maternal immune response to conceptus.

Blue rubber bleb nevus syndrome: Report of a patient with hemangiomas of the vaginal portion of the cervix appearing during pregnancy.

Blue rubber bleb nevus syndrome (BRBNS) is a rare disorder showing venous malformations in the skin and gastrointestinal tract, and other internal organs. We encountered a patient with BRBNS in whom hemangiomas of the uterine cervix appeared during pregnancy. This was apparently the first reported occurrence. To avoid unexpected bleeding from hemangiomas, patients with BRBNS should be examined repeatedly for hemangiomas of the birth canal, and special care should be taken in deciding the mode of delivery.

Cyclic and characteristic expression of phosphorylated Akt in human endometrium and decidual cells in vivo and in vitro.

BACKGROUND: Akt is activated by phosphorylation and plays an important role in cell survival and maintenance of structure. METHODS: We investigated whether phosphorylated Akt was characteristically expressed in human endometrium in vivo and whether insulin-like growth factor-I (IGF-I) can activate Akt using cultured decidualized human stromal cells in vitro, using immunohistochemistry and Western blotting analysis. RESULTS: The levels of phosphorylated Akt protein increased markedly in the decidual tissues from ectopic pregnancy. The expression of phosphorylated Akt protein in stromal cells increased with the decidualization. The decidual cells showed strong cytoplasmic staining for phosphorylated Akt. However, cultured decidualized human stromal cells diminished phosphorylated Akt expression compared to control cells. IGF-I administration to decidualized human stromal cells significantly recovered pAkt expression. The effect of IGF-I on decidualized human stromal cells was blocked by an inhibitor of phosphatidylinositol-3 kinase (PI3K) (LY294,002). These results suggest that IGF-I may activate Akt via PI3K in human endometrium and decidua. The expression of phosphorylated Akt in stromal cells was only detected in the functional layer, where tissue remodelling occurs during menstruation or implantation. CONCLUSIONS: Akt activation may be involved in cell survival and extracellular matrix remodelling in human endometrium and decidua.

Prediction of outcomes of assisted reproduction treatment using the calcium ionophore-induced acrosome reaction.

BACKGROUND: Sperm concentration and motility are poor predictors of the outcome of intrauterine insemination (IUI), hysteroscopic intratubal insemination (HIT), or complete fertilization failure (CFF) in conventional IVF. We investigated whether the calcium ionophore-induced acrosome reaction (AR) constitutes an additional indicator of CFF and pregnancy that is independent of these semen parameters. METHODS: Infertile couples with no female factor (n=388) and women with tubal obstruction (n=32) were studied: IVF (n=133), ICSI (n=72), HIT (n=245) and IUI (n=61). The percentage of acrosome-reacted sperm in relation to viable sperm was calculated. Receiver operating characteristic curve and multiple logistic regression analyses were used to determine threshold values and the best predictor for CFF and pregnancy. RESULTS: Threshold values of AR for predicting CFF in IVF and pregnancy in IVF and HIT + IUI were 21, 26 and 22% respectively. These values were independent of the conventional semen analysis parameters. CFF was lower (2 versus 20%; P<0.01) and the pregnancy rate was higher (46 versus 24% P<0.05) for those with AR >21% in IVF. CFF and pregnancy rate in ICSI did not differ according to AR. Pregnancy rate was higher for those with an AR >22% for HIT + IUI (23 versus 11% P<0.01). CONCLUSIONS: Ionophore-induced AR appears to be a useful indicator in addition to routine semen analysis for selection of patients for treatment with appropriate assisted reproduction procedure.

Chromosomal FISH analysis of unfertilized human oocytes and polar bodies.

The incidence of chromosomal aneuploidy was studied in 208 unfertilized metaphase II human oocytes from an in vitro fertilization program by fluorescence in situ hybridization using probes for chromosomes 18, 21, and X. Chromosome spreads were prepared by a gradual fixation-air-drying method. We obtained analyzable results from 183 oocytes and 93 polar bodies; 167 oocytes (91%) were normal, 11 (6%) were diploid, and 5 (3%) were aneuploid. Of the five aneuploid oocytes, four involved chromosome 21, and one involved the X chromosome. In this study, oocyte aneuploidy caused by both nondisjunction of bivalent chromosomes and predivision of univalent chromosomes was observed. The aneuploidy rate (9.8%) in the oocytes from women aged >==35 years was significantly higher than that (0.7%) in those aged 23 to 34 years ( P = 0.0017).

Fetal gender determination in early pregnancy through qualitative and quantitative analysis of fetal DNA in maternal serum.

Fetal DNA in maternal plasma and serum has been shown to be a useful material for fetal gender determination and for screening tests for abnormal pregnancies except during early gestational ages. Maternal serum samples were obtained from 81 pregnant women during the 5th-10th weeks of gestation. Fetal gender was determined by conventional polymerase chain reaction (PCR) to detect a Y-chromosomal sequence (DYS14) in maternal serum during early gestation and confirmed by examination of the newborns after delivery. Real-time quantitative analyses of the SRY and beta-globin genes were also performed in order to determine fetal gender and to quantify fetal DNA concentration in maternal serum during early gestation. When using conventional PCR, the total sensitivity of identifying a male fetus was 95%, but its sensitivity after the 7th week was 100%, whereas in real-time quantitative PCR, the total sensitivity after the 5th week was 100%. Quantitative analyses of the SRY gene revealed that the mean concentration of fetal DNA in maternal serum was 30.55 copies/ml, that fetal DNA concentration showed a tendency to increase with the progression of pregnancy, and that it had a wide normal range. Thus, we could confidently determine fetal gender by using maternal serum samples taken as early as the 7th week.

Mechanisms regulating the expression of indoleamine 2,3-dioxygenase during decidualization of human endometrium.

BACKGROUND: Expression of the tryptophan catabolizing enzyme, indoleamine 2,3-dioxygenase, in the mouse placenta has been shown to be critical in preventing immunological rejection of the fetal allograft. To clarify the physiological importance of indoleamine 2,3-dioxygenase in human pregnancy, we have studied how the expression of this enzyme changes during decidualization of human endometrium at both the cell and tissue level. METHODS AND RESULTS: The level of indoleamine 2,3-dioxygenase mRNA expression (determined by RT-PCR) was higher in decidual than in endometrial tissue. Uterine decidual tissue in ectopic pregnancy similarly showed increased mRNA expression. Immunohistochemistry demonstrated that indoleamine 2,3-dioxygenase protein immunoreactivity was found in glandular epithelium and in stromal cells. The intensity of this immunoreactivity was increased in decidualized tissue. In a cell culture model, the level of indoleamine 2,3-dioxygenase mRNA was suppressed specifically by progesterone-induced decidualization of isolated endometrial stromal cells. Indoleamine 2,3-dioxygenase protein abundance (determined by Western blot) was also decreased by progesterone-induced decidualization. However interferon-gamma, a potent stimulator of indoleamine 2,3-dioxygenase gene expression, increased the level of indoleamine 2,3-dioxygenase mRNA and protein in both non-decidualized and in decidualized cells. Indoleamine 2,3-dioxygenase activity (determined by measuring the concentration of tryptophan and its indoleamine 2,3-dioxygenase catabolite, kynurenine) was also decreased by progesterone-induced decidualization but enhanced following interferon-gamma treatment. Expression of other interferon-gamma inducible genes (STAT1 and tryptophanyl-tRNA synthetase) showed the same pattern as that of indoleamine 2,3-dioxygenase in tissue samples, but was not changed by decidualization in the cell culture model. CONCLUSIONS: These data suggest that despite suppression by progesterone, indoleamine 2,3-dioxygenase expression in endometrial stromal cells may increase during decidualization due to stimulation by interferon-gamma secreted by infiltrating leukocytes.