School-age outcomes among IVF-conceived children: A population-wide cohort study.

BACKGROUND: In vitro fertilisation (IVF) is a common mode of conception. Understanding the long-term implications for these children is important. The aim of this study was to determine the causal effect of IVF conception on primary school-age childhood developmental and educational outcomes, compared with outcomes following spontaneous conception. METHODS AND FINDINGS: Causal inference methods were used to analyse observational data in a way that emulates a target randomised clinical trial. The study cohort comprised statewide linked maternal and childhood administrative data. Participants included singleton infants conceived spontaneously or via IVF, born in Victoria, Australia between 2005 and 2014 and who had school-age developmental and educational outcomes assessed. The exposure examined was conception via IVF, with spontaneous conception the control condition. Two outcome measures were assessed. The first, childhood developmental vulnerability at school entry (age 4 to 6), was assessed using the Australian Early Developmental Census (AEDC) (n = 173,200) and defined as scoring <10th percentile in ≥2/5 developmental domains (physical health and wellbeing, social competence, emotional maturity, language and cognitive skills, communication skills, and general knowledge). The second, educational outcome at age 7 to 9, was assessed using National Assessment Program-Literacy and Numeracy (NAPLAN) data (n = 342,311) and defined by overall z-score across 5 domains (grammar and punctuation, reading, writing, spelling, and numeracy). Inverse probability weighting with regression adjustment was used to estimate population average causal effects. The study included 412,713 children across the 2 outcome cohorts. Linked records were available for 4,697 IVF-conceived cases and 168,503 controls for AEDC, and 8,976 cases and 333,335 controls for NAPLAN. There was no causal effect of IVF-conception on the risk of developmental vulnerability at school-entry compared with spontaneously conceived children (AEDC metrics), with an adjusted risk difference of -0.3% (95% CI -3.7% to 3.1%) and an adjusted risk ratio of 0.97 (95% CI 0.77 to 1.25). At age 7 to 9 years, there was no causal effect of IVF-conception on the NAPLAN overall z-score, with an adjusted mean difference of 0.030 (95% CI -0.018 to 0.077) between IVF- and spontaneously conceived children. The models were adjusted for sex at birth, age at assessment, language background other than English, socioeconomic status, maternal age, parity, and education. Study limitations included the use of observational data, the potential for unmeasured confounding, the presence of missing data, and the necessary restriction of the cohort to children attending school. CONCLUSIONS: In this analysis, under the given causal assumptions, the school-age developmental and educational outcomes for children conceived by IVF are equivalent to those of spontaneously conceived children. These findings provide important reassurance for current and prospective parents and for clinicians.

Does being conceived by assisted reproductive technology influence adult quality of life?

Numerous studies have investigated the physical health and development of children and adolescents conceived with assisted reproductive technology (ART). Less is known about the quality of life of ART-conceived adults. This study explores the contributions of being conceived with ART and psychosocial cofactors present in young adulthood to the quality of life of adults aged 22-35 years. Young adults conceived through ART or natural conception (NC) completed questionnaires which included a standardized measure of quality of life (World Health Organization Quality of Life - Brief assessment (WHOQoL-BREF)) when aged 18-28 years (T1) and again when aged 22-35 years (T2). The WHOQoL-BREF has four domains: (i) Physical, (ii) Psychological, (iii) Social relationships and (iv) Environment. A total of 193 ART-conceived and 86 NC individuals completed both questionnaires. When accounting for other cofactors in multivariable analyses, being ART-conceived was strongly associated with higher scores (better quality of life) on the Social relationships, and Environment WHOQoL-BREF domains at T2. In addition, less psychological distress, a better relationship with parents, a better financial situation, and perceptions of being about the right weight at T1 were associated with higher scores on one or more of the WHOQoL-BREF domains at T2. In conclusion, being ART-conceived can confer advantages in quality of life in adulthood, independent of psychosocial cofactors.

Reproductive function in men conceived with in vitro fertilization and intracytoplasmic sperm injection.

OBJECTIVE: To determine the semen quality and reproductive hormones of men conceived by in vitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI) compared with men conceived without assisted reproductive technology (ART). DESIGN: Cohort study. SETTING: IVF centers in Victoria and the Western Australian Raine Study. PATIENT(S): Men conceived with IVF/ICSI and men conceived without ART aged 18-25 years. INTERVENTION(S): Clinical review. MAIN OUTCOME MEASURE(S): The primary outcome was the prevalence of severe oligozoospermia (sperm concentration, <5 million/mL). The secondary outcomes were total sperm count, total and progressive motility, total motile count, normal morphology, and serum testosterone, luteinizing hormone (LH) and follicle-stimulating hormone (FSH). RESULTS: There was no difference in the prevalence of severe oligozoospermia between 120 men conceived with IVF/ICSI and 356 men conceived without ART (9% vs. 5.3%). Men conceived with IVF/ICSI had similar sperm concentration, total sperm count, and total motile count but lower mean total (55.3% vs. 60.6%) and progressive (44.7% vs. 53.9%) sperm motility with higher mean normal morphology (8.5% vs. 5.4%). Differences in progressive motility (ß, -9.9; 95% confidence interval [CI], -16.7 - -3.0), normal morphology (ß, 4.3; 95% CI, 3.0-5.7), and proportion with abnormal morphology (adjusted odds ratios, 0.1; 95% CI, 0.04-0.5) remained significant after adjusting for confounders. Men conceived with IVF/ICSI had lower mean FSH (3.3 IU/L) and LH (3.9 IU/L) levels and higher mean testosterone levels (19.1 nmol/L) than controls (4.2 IU/L, 11.0 IU/L, and 16.8 nmol/L). CONCLUSION: This study of men conceived with IVF/ICSI found similar sperm output to men conceived without ART. Overall, the results are reassuring.

Reduced live birth rates in frozen versus fresh single cleavage stage embryo transfer cycles: A cross -sectional study.

BACKGROUND: Studies have suggested that embryo-endometrial developmental asynchrony caused by slow-growing embryos can be corrected by freezing the embryo and transferring it back in a subsequent cycle. Therefore, we hypothesized that live birth rates (LBR) would be higher in frozen embryo transfer (FET) compared with fresh embryo transfers. OBJECTIVE: To compare LBR between fresh and FET cycles. MATERIALS AND METHODS: A cross-sectional analysis of 10,744 single autologous embryo transfer cycles that used a single cleavage stage embryo was performed. Multivariate analysis was performed to compare LBR between FET and fresh cycles, after correcting for various confounding factors. Sub-analysis was also performed in cycles using slow embryos. RESULTS: Both LBR (19.13% vs 14.13%) and clinical pregnancy (22.48% vs 16.25%) rates (CPR) were higher in the fresh cycle group (p < 0.00). Multivariate analysis for confounding factors also confirmed that women receiving a frozen-thawed embryo had a significantly lower LBR rate compared to those receiving a fresh embryo (OR 0.76, 95% CI 0.68-0.86, p < 0.00). In the sub-analysis of 1,154 cycles using slow embryos, there was no statistical difference in LBR (6.40% vs 6.26%, p = 0.92) or CPR (8.10% vs 7.22%, p = 0.58) between the two groups. CONCLUSION: This study shows a lower LBR in FET cycles when compared to fresh cycles. Our results suggest that any potential gains in LBR due to improved embryo-endometrial synchrony following FET are lost, presumably due to freeze-thaw process-related embryo damage.

American Heart Association ideal cardiovascular health score and subclinical atherosclerosis in 22-35-year-old adults conceived with and without assisted reproductive technologies.

STUDY QUESTION: Is ART related with the association of American Heart Association (AHA) ideal cardiovascular health score and markers of subclinical atherosclerosis? SUMMARY ANSWER: The associations between AHA score and markers of subclinical atherosclerosis in ART and non-ART groups were similar in magnitude. WHAT IS KNOWN ALREADY: Long-term consequences of ART on cardiovascular health are unknown. STUDY DESIGN, SIZE, DURATION: The study cohort for the cross-sectional analyses consisted of 172 ART-conceived and 78 non-ART conceived individuals of same age (range 22-35 years). PARTICIPANTS/MATERIALS, SETTING, METHODS: Cardiovascular risk factor status was evaluated with American Heart Association (AHA) ideal cardiovascular health score consisting of seven factors (body mass index, blood pressure, total cholesterol, glucose, diet and physical activity, non-smoking). Carotid artery intima-media thickness (cIMT), arterial pulse-wave velocity (PWV) and retinal microvascular parameters were evaluated as markers of early atherosclerosis. Group comparisons in continuous variables were performed with t-tests. For categorical variables, comparisons were performed with chi-square tests. The relationships between AHA score and the markers of atherosclerosis were examined with linear regression analyses adjusted for age and sex. MAIN RESULTS AND THE ROLE OF CHANCE: There was no difference in AHA ideal health score between the ART and non-ART groups; mean (SD) scores were 4.1(1.4) versus 4.0(1.5), respectively, P = 0.65. No differences were observed between groups for any individual ideal health metric (P always >0.2). AHA score was not associated with cIMT or retinal measures in either group (P always >0.05). An inverse association was observed between AHA score and PWV in the ART group (beta (95% CI) -0.18(-0.26 to -0.10)). A numerically similar relationship was observed in the smaller non-ART group (-0.19(-0.39 to 0.01)). LIMITATIONS, REASONS FOR CAUTION: Even though this cohort is among the largest ART studies with extensive cardiovascular data, the sample is still relatively small and the statistical power is limited. As the study population was still in early adulthood, we were not able to evaluate the associations with clinical cardiovascular events, but utilized non-invasive methods to assess early markers of subclinical atherosclerosis. WIDER IMPLICATIONS OF THE FINDINGS: These findings suggest that ART-conceived individuals do not have increased vulnerability for cardiovascular risk factors. STUDY FUNDING/COMPETING INTEREST(S): This study was funded by a National Health & Medical Research Council Project Grant (APP1099641), The Royal Children's Hospital Research Foundation, Monash IVF Research and Education Foundation, and Reproductive Biology Unit Sperm Fund, Melbourne IVF. The authors have no conflicts of interest relevant to this article to disclose.

Assisted reproductive technologies are associated with limited epigenetic variation at birth that largely resolves by adulthood.

More than 7 million individuals have been conceived by Assisted Reproductive Technologies (ART) and there is clear evidence that ART is associated with a range of adverse early life outcomes, including rare imprinting disorders. The periconception period and early embryogenesis are associated with widespread epigenetic remodeling, which can be influenced by ART, with effects on the developmental trajectory in utero, and potentially on health throughout life. Here we profile genome-wide DNA methylation in blood collected in the newborn period and in adulthood (age 22-35 years) from a unique longitudinal cohort of ART-conceived individuals, previously shown to have no differences in health outcomes in early adulthood compared with non-ART-conceived individuals. We show evidence for specific ART-associated variation in methylation around birth, most of which occurred independently of embryo culturing. Importantly, ART-associated epigenetic variation at birth largely resolves by adulthood with no direct evidence that it impacts on development and health.

Health of adults aged 22 to 35 years conceived by assisted reproductive technology.

OBJECTIVE: To determine the health outcomes for adults aged 22-35 years old who were conceived via assisted reproduction technology (ART) compared with adults of the same age conceived without use of ART. DESIGN: Cohort study. SETTING: Not applicable. PATIENT(S): Adult men and women aged 22-35 years who were conceived with and without use of ART. INTERVENTION(S): Questionnaire and clinical review. MAIN OUTCOME MEASURE(S): Vascular structure (carotid artery intima-media thickness, pulse wave velocity), vascular function (blood pressure), metabolic markers (fasting blood glucose, insulin, and standard lipid profiles), anthropometric measurements, and respiratory function (spirometry). RESULT(S): The mean age of the 193 ART and 86 non-ART participants was 27.0 and 26.9 years, respectively. There were no substantial intragroup differences in demographics or vascular intermediate phenotypes, metabolic parameters, or anthropometric measures, before or after adjusting for perinatal factors and a quality of life measure with four domains. Diastolic blood pressure was lower in the ART men than the non-ART men (adjusted mean difference -4.4 mm Hg, 95% CI, -8.7 to -0.1). The ART group reported a higher prevalence of ever having asthma, (40.8% vs. 28.6%; odds ratio 1.7; 95% CI, 1.0-3.0), but expiratory flow rates were similar. CONCLUSION(S): This study of the health of 193 adults conceived via ART, the largest to date globally, found no evidence of increased vascular or cardiometabolic risk, or growth or respiratory problems in the ART group compared with a non-ART group from the same source population. Follow-up observation for reproductive and later-onset adverse health effects remains important.

Fertility management experiences of women with polycystic ovary syndrome in Australia.

BACKGROUND: Women with polycystic ovary syndrome (PCOS) are usually told that the condition is associated with fertility difficulties. However, little is known about their fertility management including contraceptive use, childbearing desires, and pregnancy outcomes. AIM: To compare the fertility management experiences and outcomes of Australian women with and without PCOS. METHOD: The 2013 Australian electoral roll was used to identify a random sample of 18- to 50-year-old women who were sent the Understanding Fertility Management in Australia survey to be completed anonymously. Factors associated with fertility management and outcomes were identified in multivariable analyses. RESULTS: Among the 1543 women who completed and returned the survey, 113 (7.3%) reported having PCOS. Women with PCOS reported a similar rate of current contraceptive use as women without PCOS (50.4% vs. 52.6%, p = .66). However, they were significantly younger at first pregnancy (24.9 vs. 26.8 years, p = .015), more likely to have consulted a health professional about fertility management (OR: 3.86, 95% CI: 2.50-5.96, p < .001), and perceive that it would be difficult to conceive (OR: 2.31, 95% CI: 1.41-3.79, p = .001) than women without PCOS. There were no significant differences in the number of desired children, unintended pregnancies, live births, abortions or miscarriages between women with and without PCOS. CONCLUSION: These findings indicate that women with PCOS need more nuanced information about their fertility potential. While they may experience fertility difficulties because of their condition, they should also be informed that they can conceive spontaneously and need reliable contraception to avoid pregnancy when it is not wanted.

The Fertility Management Experiences of Australian Women with a Non-communicable Chronic Disease: Findings from the Understanding Fertility Management in Contemporary Australia Survey.

Introduction Despite the considerable and increasing proportion of women of reproductive age with a chronic non-communicable disease (NCD) and the potential adverse implications of many NCDs for childbearing, little is known about the fertility management experiences of women with an NCD, including their contraceptive use, pregnancy experiences and outcomes, and reproductive health care utilisation. The aim of this study was to investigate the fertility management experiences of women with an NCD and draw comparisons with women without an NCD. Method A sample of 18-50 year-old women (n = 1543) was randomly recruited from the Australian electoral roll in 2013. Of these women, 172 women reported a physical, chronic non-communicable disease: diabetes, arthritis, asthma, hypertension, heart disease, thyroid disorders, and cystic fibrosis. Respondents completed an anonymous, self-administered questionnaire. Factors associated with fertility management were identified in multivariable analyses. Results Women who reported having an NCD were significantly more likely than women who did not report an NCD to have ever been pregnant (75.9 vs. 67.5%, p = 0.034), have had an unintended pregnancy (33.47 vs. 25.5%, p = 0.026), and have had an abortion (20.3 vs. 14.2%, p = 0.044); they were less likely to consult a healthcare provider about fertility management (45.0 vs. 54.4%, p = 0.024). Similar proportions were using contraception (48.8 vs. 54.5%, p = 0.138). Conclusion The findings have implications for healthcare providers and women with an NCD and highlight the importance of addressing possible assumptions about the inability of women with an NCD to become pregnant, and ensuring women receive information about suitable methods of contraception and pre-pregnancy care.

Clinical review of 24-35 year olds conceived with and without in vitro fertilization: study protocol.

BACKGROUND: Children conceived by assisted reproductive technologies (ART) currently comprise 4% of Australian births. The manipulation of biological parameters related to fertilization and implantation are integral to successful ART but potentially pose a risk to the longer-term health of the offspring. There is consensus that many common adult health problems (particularly cardiovascular, metabolic and respiratory conditions) have their origins in early life, possibly before birth, and that risk trajectories track through childhood until clinical disease manifests in adulthood. Early life epigenetic variation may play a role in this process. However little is known about the long-term health of individuals conceived by ART. In a previous study, based on telephone-interviews, we found that young adults conceived by in vitro fertilization (IVF) had significantly more maternal reported atopic respiratory, endocrine, nutritional, and metabolic conditions than non-IVF conceived matched controls. Here we outline the protocol for a follow-up biomedical assessment of this cohort and a questionnaire to obtain information on potential confounders. METHODS: We are conducting a clinical review of an existing, well characterised cohort comprising 547 IVF-conceived adults and 549 matched controls. We are measuring cardiovascular intermediate phenotypes, metabolic parameters and respiratory function, complemented by epigenome-wide DNA methylation analysis. A pilot study demonstrated the feasibility of our proposed protocol and its acceptability to participants. Participants attend a 2-3 h clinical assessment and complete a study-specific online questionnaire. Measurements include: 1) cardiovascular phenotypes: carotid artery intima-media thickness and distensibility, retinal vascular calibre, resting blood pressure, pulse wave velocity and pulse wave analysis; 2) respiratory function: spirometry, plethysmography, multiple breath washout; 3) auxology: height, weight, waist circumference, bio-impedance. Blood is collected for 4) biomarkers of cardiometabolic profile including inflammatory markers and 5) epigenetic analysis. DISCUSSION: Recruitment for this clinical review is challenging as many of the participants have moved to regional, interstate or international locations. Additionally, many female participants are pregnant or breastfeeding, and are therefore ineligible. Nevertheless, comprehensive strategies have been developed to optimize recruitment. Given the increasing use of IVF and related technologies, the potential long-term consequences for risk of common adult diseases is an important clinical and public health issue.

Health outcomes of school-aged children conceived using donor sperm.

The use of donor sperm is increasing, yet limited information is available about the health and development of children conceived from donor sperm. This retrospective descriptive study aimed to assess health and development in a cohort of school-aged children who were conceived using donor sperm. Participants included 224 children, aged 5-11 years, who were conceived using donor sperm. Participants' mothers completed a questionnaire comprising validated scales examining their child's current and past physical, psychosocial and mental health, healthcare needs and child development, as well as the mothers' health and wellbeing. At the conclusion of the study, the response rate was 296 out of 407 (72.7%), with a participation rate of 224 out o 407 (55.0%). Compared with the normative Australian population, sperm donor-conceived children had similar physical, psychosocial and mental health and development. A modest increase in healthcare needs was evident. The study concludes that in school-aged children conceived using donor sperm, most aspects of child health and wellbeing are similar to the general population.

Abortion: findings from women and men participating in the Understanding Fertility Management in contemporary Australia national survey.

Background There are few reliable Australian abortion data. The aim was to investigate prevalence, sexual experiences and socioeconomic characteristics of women and men who report having had or being a partner in an abortion. METHODS: A cross-sectional survey of women and men aged 18-50 years randomly selected from the Australian Electoral Roll was used. Weighted multivariable analyses were conducted. RESULTS: Data from 2235 returned (of 15480) mailed surveys were analysed. One in six women and one in 10 men had experienced or been a partner in an abortion. In adjusted analyses, for women, experience of sexual coercion [adjusted odds ratio (AOR) 2.18, 95% confidence interval (CI) 1.46, 3.24] was associated with significantly increased odds of abortion, and socioeconomic advantage (AOR=0.57; 95% CI 0.39, 0.84), being comfortable negotiating contraceptive use (AOR 0.26; 95% CI 0.09, 0.73) and importance of religion in fertility choices (AOR=0.55; 95% CI 0.35, 0.87) were associated with significantly reduced odds. For men, sexual coercion (AOR=3.05; 95% CI 1.51, 6.18) and metropolitan residence (AOR=1.70; 95% CI 1.06, 2.75) significantly increased the odds of reporting being a partner in an abortion. CONCLUSIONS: The findings contribute to scarce information about abortion in Australia. The high prevalence of abortion suggests that effective contraceptive counselling and accessible contraception services are not sufficient, and that there is a continuing need for universal pregnancy advice and abortion services. The association between sexual coercion and abortion warrants further investigation.

Sociodemographic characteristics associated with the use of effective and less effective contraceptive methods: findings from the Understanding Fertility Management in Contemporary Australia survey.

OBJECTIVE: Unintended pregnancy and abortion may, in part, result from suboptimal use of effective contraception. This study aimed to identify sociodemographic factors associated with the use of effective and less effective methods among women and men of reproductive age living in Australia. METHODS: In a cross-sectional national survey, 1544 women and men aged 18-51 were identified as being at risk of pregnancy. Chi-square and logistic regression analyses were used to assess the sociodemographic factors related to contraceptive use. RESULTS: Most respondents (n = 1307, 84.7%) reported using a method of contraception. Use of any contraceptive was associated with being born in Australia (Odds Ratio [OR] 1.89; 95% Confidence Interval [CI]1.186, 3.01; p = .008), having English as a first language (OR 1.81; 95% CI: 1.07, 3.04; p = .026), having private health insurance (OR 2.25; 95% CI 1.66, 3.04; p < .001), and not considering religion important to fertility choices (OR 0.43; 95%CI 0.31, 0.60; p < .001). A third used effective contraceptive methods (n = 534, 34.6%; permanent methods: 23.1%, and long-acting reversible contraception (LARC): 11.4%). Permanent methods were more likely to be used in rural areas (OR 0.62; 95%CI 0.46, 0.84; p = .002). Use of the least effective, short-term methods was reported by nearly half (condoms: 25.6%, withdrawal: 12.5%, and fertility-awareness-based methods: 2.8%). Those who relied on withdrawal were more likely to live in a metropolitan area (OR 2.85; 95% CI 1.95, 4.18; p < .001), and not have private health insurance (OR 0.52; 95% CI 0.38, 0.71; p < .001). CONCLUSIONS: Targeted promotion of the broad range of available contraceptives may raise awareness and uptake of more effective methods and improve reproductive autonomy in certain population groups.

Reproductive experiences of women who cryopreserved oocytes for non-medical reasons.

STUDY QUESTION: What are the reproductive experiences of women who cryopreserve oocytes for non-medical reasons? SUMMARY ANSWER: One in three women had been pregnant at some stage in their lives and while most still wanted to have a child or another child, very few had used their stored oocytes, predominantly because they did not want to be single parents. WHAT IS KNOWN ALREADY: The number of healthy women who freeze oocytes to avoid age-related infertility is increasing. Evidence about reproductive outcomes after oocyte cryopreservation for non-medical reasons is needed to help women make informed decisions. STUDY DESIGN SIZE, DURATION: A cross-sectional survey was carried out. Study packs which included a self-administered questionnaire were mailed by clinic staff to 193 eligible women. PARTICIPANTS/MATERIALS, SETTING, METHODS: Women who had stored oocytes for non-medical reasons at Melbourne IVF, a private ART clinic, between 1999 and 2014 were identified from medical records and invited to complete an anonymous questionnaire about their reproductive histories and experience of oocyte cryopreservation. MAIN RESULTS AND THE ROLE OF CHANCE: A total of 10 survey packs were returned to the clinic marked 'address unknown'. Of the 183 potential respondents, 96 (53%) returned the questionnaire. One respondent provided only free-text comments, thus data from 95 respondents were compiled. The mean age at the time of freezing oocytes was 37.1 years (SD ± 2.6, range: 27-42) and the average number of oocytes stored was 14.2 (SD ± 7.9, range: 0-42); 2% had attempted to store oocytes but had none suitable for freezing, 24% had stored <8 oocytes, 35% had 8-15, 25% had 16-23 and 14% had stored >23 oocytes. About one-third of respondents (34%) had been pregnant at some point in their lives. Six women (6%) had used their stored oocytes and three of them had given birth as a result. The main reason for not using stored oocytes was not wanting to be a single parent. Of the 87 (91%) women who still had oocytes stored, 21% intended to use them while 69% indicated that their circumstances would determine usage. The mean number of children respondents would ideally have liked to have was significantly higher than the number of children they expected to have (2.11 versus 1.38, P < 0.001). LIMITATIONS, REASONS FOR CAUTION: The limitations are inherent to any anonymously completed questionnaire: participation bias, missing data and the possibility that some questions or response alternatives may have been ambiguous. WIDER IMPLICATIONS OF THE FINDINGS: The findings add to the very limited evidence about the reproductive outcomes experienced by women who freeze oocytes for non-medical reasons and can be used to help women make informed decisions about whether to store oocytes. STUDY FUNDING/COMPETING INTEREST(S): The study was funded by Melbourne IVF. K.H. has received honoraria from Merck-Serono, J.M. is a clinician at Melbourne IVF, F.A. is a Melbourne IVF employee, J.F. is supported by a Monash Professorial Fellowship and the Jean Hailes Professorial Fellowship which receives funding from the L and H Hecht Trust, managed by Perpetual Trustees Pty Ltd. M.K., N.P., M.H., M.P. and C.B. have no competing interests. TRIAL REGISTRATION NUMBER: Not applicable.

Subjective meanings of 'unintended' pregnancy: interviews from understanding fertility management in contemporary Australia.

Unintended pregnancy can be difficult to identify and conceptualise. We aimed to understand how unintended pregnancies are constructed, explained and situated in a reproductive life. A total of 41 women and 7 men aged 20-50 years were interviewed in depth. Transcripts were analysed using iterative hermeneutic techniques informed by narrative theory. Of 34 participants who had been pregnant or had a partner in pregnancy, 12 women and 1 man described 23 'unintended' pregnancies, about half of which ended in abortion. Their accounts reveal that an unintended pregnancy is identified subjectively, that the same pregnancy may be identified by one partner in the pregnancy as unintended and by the other as intended, and that a researcher's supposedly objective assessment of an unintended pregnancy may be inconsistent with the assessment of the woman who experienced it. A pejorative discourse was evident, predominantly among participants who did not report having an unintended pregnancy: women use an 'unintended' pregnancy to entrap men. Accounts from five participants reporting an unintended pregnancy were selected for illustration. An appreciation of the role such a pregnancy might play in an individual life requires a nuanced understanding of the complexity of human experience and a resistance to simple binary categorisation.

Characteristics and circumstances of women in Australia who cryopreserved their oocytes for non-medical indications.

OBJECTIVE: This study aimed to explore the characteristics and circumstances of women who cryopreserved their oocytes for non-medical indications and their reasons for cryopreservation. BACKGROUND: Oocyte cryopreservation for non-medical reasons is becoming increasingly common. Little is known about women who freeze their oocytes in this context. METHODS: All women who had cryopreserved oocytes for non-medical indications at a large Australian fertility treatment centre from 1999 to 2014 were invited to complete an anonymous postal survey. RESULTS: Of the 193 questionnaires mailed, 10 were returned to sender; 96/183 (53%) were completed and returned. Most respondents had completed tertiary education (90%) and were employed in professional occupations (89%). At the time of oocyte cryopreservation, 48% of women were aged at least 38 years (range 28-44 years). Most (90%) women were single when their oocytes were frozen. The lack of a partner or having a partner unwilling to commit to fatherhood were the most common reasons for oocyte freezing, which was viewed as an investment in hope against the possibility of remaining in these predicaments. Some women reported that discussions in the media and interactions with peers influenced their decisions. A few women were influenced by tests indicating a low ovarian reserve. CONCLUSION: These data provide new evidence about women's characteristics, circumstances, and reasons for oocyte cryopreservation for non-medical indications that do not support pejorative conceptualisations of these women as selfish and hedonistic.

What is the contribution of embryo-endometrial asynchrony to implantation failure?

PURPOSE: The synchronized development of a viable embryo and a receptive endometrium is critical for successful implantation to take place. The aim of this paper is to review current thinking about the importance of embryo-endometrial synchrony in in vitro fertilization (IVF). METHODS: Detailed review of the literature on embryo-endometrial synchrony. RESULTS: By convention, the time when the blastocyst first attaches and starts to invade into the endometrium has been defined as the 'window of implantation'. The term window of implantation can be misleading when it is used to imply that there is a single critical window in time that determines whether implantation will be successful or not. Embryo maturation and endometrial development are two independent continuous processes. Implantation occurs when the two tissues fuse and pregnancy is established. A key concept in understanding this event is developmental 'synchrony', defined as when the early embryo and the uterus are both developing at the same rate such that they will be ready to commence and successfully continue implantation at the same time. Many different events, including controlled ovarian hyperstimulation as routinely used in IVF, can potentially disrupt embryo-endometrial synchrony. There is some evidence in humans that implantation rates are significantly reduced when embryo-endometrial development asynchrony is greater than 3 days (±1.5 days). CONCLUSIONS: Embryo-endometrial synchrony is critical for successful implantation. There is an unmet need for improved precision in the evaluation of endometrial development to permit better synchronization of the embryo and the endometrium prior to implantation.