Reconceiving egg freezing: insights from an analysis of 5 years of data from a UK clinic

Return rates and pregnancy outcomes after oocyte preservation for planned fertility delay: a systematic review and meta-analysis

IMPORTANCE

Oocyte preservation for planned fertility delay, also referred to as social oocyte preservation or colloquially as "egg freezing," has become increasingly popular in the last few decades. Previous literature has suggested that there are gaps in counseling and expectations regarding the expected thaw rates and outcomes of preserved oocytes.

OBJECTIVE

To characterize the literature on social oocyte preservation, specifically the return rates, thaw rates, clinical pregnancy rates, and live birth rates.

DATA SOURCES

We conducted a systematic review following Preferred Reporting Items for Systematic Reviews and Meta-Analyses of 7 databases (MEDLINE, EMBASE, Emcare, CINAHL, the Cochrane Library, Web of Science: Core Collection, and Scopus) until January 1, 2024. The Risk Of Bias In Non-randomized Studies of Interventions tool was used for critical appraisal.

STUDY SELECTION AND SYNTHESIS

All original human research that reported data for individuals who underwent autologous oocyte preservation for planned fertility delay (i.e., not for medical indications such as chemotherapy) was included for analysis. A meta-analysis was conducted using descriptive statistics and pooled prevalence rates. Title and abstract screening and data extraction were conducted in duplicate by 2 independent reviewers for all studies until full agreement on eligibility was achieved through consensus-based discussion.

MAIN OUTCOMES

Return rate among those who froze oocytes for planned fertility delay, as well as live birth rate and clinical pregnancy rate among these patients.

RESULTS

After screening 1,540 references, a total of 27 studies encompassing 13,724 patients were included. Follow-up ranged from 4 to 19 years, with a median follow-up time of 7 years. A total of 17,418 oocyte retrieval cycles for planned fertility delay were reported, with most individuals undergoing a single cryopreservation cycle. Overall, 10.8% of individuals returned to thaw their eggs, with an aggregate oocyte survival rate of 81.4%. The implantation rate was 44.4% and clinical pregnancy rate was 34.2%. A live birth was reported for 28.9% of individuals across all age groups who returned to thaw eggs.

CONCLUSIONS AND RELEVANCE

Individuals should be counseled regarding the low return rates after oocyte preservation for planned fertility delay.

Clinical outcomes of vitrified-warmed autologous oocyte cycles with 15-year follow-up at a single UK centre: consistent and predictable results

RESEARCH QUESTION

What were the clinical outcomes from 332 autologous vitrified- warmed oocyte cycles derived from 3182 elective autologous oocyte freeze cycles carried out between 2008 and 2022 in a single-centre series?

DESIGN

In this retrospective observational study, outcomes in 299 patients returning to use their frozen oocytes between 2015 and 2023 were analysed.

RESULTS

A total of 3328 elective oocyte vitrification cycles were performed in 2280 patients. The return rate to use oocytes was 14% (299/2171). Mean ages were 37.6 years at storage and 40 at warming. Ninety-three clinical pregnancies and 77 healthy live births were recorded. The live birth rate (LBR) was 24% (39/163) per fresh transfer and 17% (39/227) per embryo transferred. Stratified by age at freezing, the LBR per embryo transferred was 26% (12/47) in participants under 35 years, 20% (24/118) in those 35-39 years and 5% (3/62) in those 40+ years. Frozen embryo transfers (FET) achieved a 30% (24/80) LBR per embryo transfer and a 27% (24/90) LBR per embryo transferred. PGT-A for embryo selection doubled the LBR compared with FET from an untested embryo after one attempt (40% versus 21%). In patients aged over 40 years, the cumulative LBR reached 42% per patient in euploid FET.

CONCLUSION

The proportion of patients who returned to use their stored oocytes and the clinical outcomes were consistent with other recent reports and challenges the prevalent critical narrative regarding elective oocyte freezing for fertility preservation. The results are now comparable to routine IVF. Not everyone who returns to use their oocytes will conceive, but for those choosing to preserve their fertility, oocyte freezing can provide reproducible and reassuring results.

Storage trends, usage and disposition outcomes following egg freezing

RESEARCH QUESTION

What happens to eggs after egg freezing?

DESIGN

A retrospective cohort study was performed spanning 2012-2022. Data were obtained from seven assisted reproductive technology clinics in Victoria, Australia. Aggregated, de-identified data were collected on cycles that resulted in egg freezing and the following outcomes, including treatment involving thawed eggs and disposition outcomes of surplus eggs.

RESULTS

The number of patients with eggs in storage grew rapidly from 144 in 2012 to 2015 in 2022. In 2022, 73% of patients had stored their eggs for <5 years, 25% for 5-10 years, and 2% for ≥10 years. Most thaw cycles (600/645, 93%) involved eggs that had been frozen for <5 years, of which 47% had been frozen for <6 months. Overall, the live birth rate per initiated thaw cycle was 12%. Across the study period, 2800 eggs from 286 patients were either discarded, donated or exported. Of the 128 patients who discarded their eggs, 32% had stored their eggs for <5 years, 32% for 5-10 years and 36% for >10 years. Of the 23 patients who donated their eggs to someone else, all but four had stored their eggs for <5 years. No eggs were donated to research over the study period.

CONCLUSIONS

This study shows that very few patients have made the decision to use or relinquish their eggs. Strategies may be needed to address the prolonged storage of surplus eggs, and ensure that patients are supported to make decisions regarding the fate of their eggs which align with their preferences and values.

A 10-year follow-up of reproductive outcomes in women attempting motherhood after elective oocyte cryopreservation

STUDY QUESTION

Which reproductive treatment outcomes are observed in women who underwent elective oocyte cryopreservation (EOC) and who returned to the clinic with a desire for a child?

SUMMARY ANSWER

Whether to warm oocytes or to first use fresh own oocytes for ART depends on age upon returning, but both strategies result in favorable reproductive outcomes.

WHAT IS KNOWN ALREADY

Most affluent countries have observed a trend toward postponement of childbearing, and EOC is increasingly used based on the assumption that oocytes cryopreserved at a younger age may extend a woman's reproductive lifespan and mitigate her age-related fertility decline. Although most follow-up studies after EOC have focused on women who requested oocyte warming, a substantial proportion of women who do not conceive naturally will embark on fertility treatment without using their cryopreserved oocytes. Reports on reproductive outcomes in past EOC users are scarce, and the lack of reproductive treatment algorithms in this group of women hampers counseling toward the most efficient clinical strategy.

STUDY DESIGN, SIZE, DURATION

This retrospective observational single-center study encompasses 843 women who had elective oocyte vitrification between 2009 and 2019 at our fertility clinic. Women who underwent fertility preservation for medical or oncological reasons were excluded. This study describes the outcomes of the diverse reproductive treatment strategies performed until May 2022 in women returning to our clinic to attempt motherhood.

PARTICIPANTS/MATERIALS, SETTING, METHODS

Using descriptive statistics, patient characteristics and data of ovarian stimulation (OS) of EOC cycles were analyzed, as well as data related to OS and laboratory data of ART in women who pursued fertility treatment with and/or without using their cryopreserved oocytes. The primary outcome was live birth rate (LBR) per patient after oocyte warming and after ART using fresh oocytes. Secondary outcomes were return rate, utilization rate of the cryopreserved oocytes, laboratory outcomes upon return, and LBR per embryo transfer. A multivariable regression model was developed to identify factors associated with the decision to thaw oocytes as the primary strategy and factors associated with ongoing pregnancy upon return to the clinic.

MAIN RESULTS AND THE ROLE OF CHANCE

A total of 1353 EOC cycles (mean ± SD, 1.6 ± 0.9 per patient) were performed. At the time of EOC, the mean age was 36.5 ± 2.8 years, mean anti-Müllerian hormone (AMH) was 2.3 ± 2.0 ng/ml, and 174 (20.6%) women had a partner. On average, 13.9 ± 9.2 mature oocytes were cryopreserved. Two hundred thirty-one (27.4%) women returned to the clinic, an average of 39.9 ± 23.4 months after EOC. Upon returning, their mean age was 40.4 ± 3.1 years, mean AMH was 1.5 ± 1.5 ng/ml, and 158/231 (68.3%) patients had a partner. As a primary approach, 110/231 (47.6%) past EOC users embarked on oocyte warming, 50/231 (21.6%) had intrauterine insemination, and 71/231 (30.7%) had ART using fresh own oocytes. Cumulative LBR (CLBR) was 45.9% (106/231) notwithstanding a miscarriage rate (MR) of 30.7% (51/166) in the entire cohort. In total, 141 women performed oocyte warming at some stage in their treatment trajectory. A subset of 90/231 (39.0%) patients exclusively had oocyte warming (41.6 ± 3.0 years, with 10.0 ± 5.2 oocytes warmed per patient). 52/231 (22.5%) patients exclusively had ART using fresh own oocytes (mean age of 39.0 ± 2.8 years, with 9.9 ± 7.4 mature oocytes retrieved per patient). CLBR was 37/90 (41.1%) in the oocyte warming-only group and 25/52 (48.1%) in the OS-only group. MR/transfer was 25.0% and 29.3% in the oocyte warming-only group and the OS-only group, respectively.

LIMITATIONS, REASONS FOR CAUTION

Both sample size and the retrospective design are limitations of this study. The decision to embark on a specific reproductive treatment strategy was based on patient preference, after counseling on their treatment options. This precludes direct comparison of the efficiency of reproductive treatment options in past EOC users in this study.

WIDER IMPLICATIONS OF THE FINDINGS

Reporting on clinical outcomes of women who underwent EOC and returned to the clinic to embark on divergent reproductive treatment strategies is mandatory to establish guidelines for best clinical practice in this growing patient population.

STUDY FUNDING/COMPETING INTEREST(S)

None.

TRIAL REGISTRATION NUMBER

N/A.

Utilization of Cryopreserved Oocytes in Patients With Poor Ovarian Response After Planned Oocyte Cryopreservation

Importance

Poor ovarian response (POR) to stimulation may impact patients' desire or need to utilize cryopreserved oocytes for family building in the future. These findings, captured by Society for Assisted Reproductive Technology (SART) national data, underscore the need for tailored counseling and further research into the decision-making processes influencing oocyte utilization.

Objective

To examine the association of ovarian response to stimulation and the number of vitrified oocytes with the likelihood and timing of patients returning for oocyte utilization following planned oocyte cryopreservation (OC).

Design, Setting, and Participants

This cohort study used data in the SART Clinical Outcome Reporting System for patients in US fertility clinics and data was used for eligible patients who underwent planned OC from January 2014 through December 2020. Data were analyzed from November 2022 to June 2023.

Main outcomes and measures

The association between number of oocytes cryopreserved on return rate to utilize cryopreserved oocytes and the time from vitrification to warming.

Results

A total of 67 893 autologous oocyte freezing cycles were performed in the US between 2014 and 2020, among 47 363 patients (mean [SD] age, 34.5 [4.7] years). Of these, 6421 (13.5%) were classified as patients with POR, with fewer than 5 oocytes vitrified across all ovarian stimulation cycles. A total of 1203 patients (2.5%) returned for oocyte warming and utilization. The rate of return was significantly higher in the POR group, with 260 (4.0%) returning compared with 943 (2.3%) in the normal responder group (P < .001). This trend was most notable in the age 30 to 34 years (warm cycle, 46 of 275 [16.7%] vs no warm cycle, 982 of 11 743 [8.4%]; P < .001) and age 35 to 39 years groups (warm cycle, 124 of 587 [21.1%] vs no warm cycle, 3433 of 23 012 [14.9%]; P < .001). The time elapsed from vitrification to warming was comparable between patients with POR (mean [SD], 716.1 [156.1] days) and normal responders (803.8 [160.7] days). A multivariate analysis adjusted for age, clinic region in the US, body mass index, and history of endometriosis was conducted to identify factors associated with the utilization of oocytes. The analysis revealed that having fewer than 5 oocytes vitrified was associated with higher odds of utilizing oocytes (OR, 1.52; 95% CI, 1.32-1.76).

Conclusions and Relevance

This cohort study reveals a distinct pattern in the utilization of cryopreserved oocytes among patients undergoing planned OC in the US. Despite the increase in number of patients pursuing OC, there is a notably low rate of return to utilize previously vitrified oocytes; notably, patients with POR are more likely to return, although the time to return is similar to those with normal ovarian response.

Knowledge and attitude of reproductive-aged women towards planned oocyte cryopreservation in the United Arab Emirates

BACKGROUND

Delayed conception is associated with a decline in oocyte number and quality. Oocyte cryopreservation techniques are used for medical or non-medical (elective) reasons. We aim to assess the knowledge and attitudes towards planned oocyte cryopreservation (POC) among reproductive-aged women in the United Arab Emirates (UAE) and to investigate the factors interfering with their decisions.

METHODS

A cross-sectional study on 422 women (18-38 years) living in the UAE, using an online questionnaire with three sections: sociodemographic, knowledge, and attitudes towards POC.

RESULTS

91.2% of participants have heard of POC, 84.1% hold a bachelor's degree or higher, 65.4% with medical background, 54.3% employed, and 79.2% live in Sharjah and Dubai. Consideration of POC was significantly associated with age (p = 0.011), employment (p = 0.002), the Emirates they live (p < 0.001), and if they have heard of POC (p = 0.036). Mean knowledge score was 44.44%, which was significantly higher among those considering POC (49.66% vs. 40.55%), and social media was their main source of information. About 57% will not consider POC, mainly due to cost, cultural issues, and safety. Determinants of knowledge score were marital status (B = 0.44; 95%CI: 0.09-0.79; p value = 0.014) and education level (B = 0.35; 95%CI: 0.13-0.58; p value = 0.002), and after adjustment, only the education level remained significantly associated with knowledge score (B = 0.24; 95%CI: 0.01-0.47; p value = 0.042).

CONCLUSION

Despite many participants being motivated to undergo POC, majority had poor knowledge, and cost was the main barrier. The main determinant of the knowledge score was education level. Awareness among couples of consequences of delaying childbearing and comprehensive information from medical practitioners are highly needed.

Too much equity - is there such a thing? The public discourse surrounding elective egg freezing subsidy in Israel

BACKGROUND

The preservation of human ova for future fertilization has been made available to healthy women in 2011-2012. This treatment, dubbed elective egg freezing (EEF), is undertaken primarily by highly educated unpartnered women without children, concerned of age-related fertility decline. In Israel, treatment is available to women aged 30-41. However, unlike many other fertility treatments, EEF is not state subsidized. The public discourse of EEF funding in Israel is the focus of the present study.

METHOD

The article analyzes three sources of data: press presentations of EEF; a Parliamentary Committee discussion dedicated to EEF funding; interviews with 36 Israeli women who have undertaken EEF.

RESULTS

Numerous speakers raised the issue of equity, claiming that reproduction was a state interest and therefore, a state responsibility, including securing equitable treatment to Israeli women of all economic strata. Highlighting the generous funding of other fertility treatments, they claimed that EEF was inequitable, discriminating against poorer single women, who could not afford it. Few actors, however, rejected state funding as intervention in women's reproductive lives and called for reconsideration of the local reproductive imperative.

CONCLUSION

The invocation of equity by Israeli users of EEF, clinicians and some policy makers as grounds for a call to fund a treatment that serves a well-established subpopulation seeking to relieve a social rather than a medical problem, illustrates the profound context-embeddedness of notions of health equity. More generally, it may suggest that using an inclusive language in a discourse of equity may potentially be invoked so as to promote the interests of a particular subpopulation.

Exploring Medical Egg Freezing as a Disease Management Strategy

Medical egg freezing (MEF) allows women with fertility-threatening diseases to have their oocytes cryopreserved and stored for later use. Endometriosis is a common gynecological disease that might cause infertility. Qualitative research on endometriosis patients' experiences with MEF is minimal. I report on in-depth interviews among French endometriosis patients undertaking MEF. Their experiences are profoundly shaped by endometriosis-related pain. Egg freezing was described as a disease management strategy to cope with potential future infertility integral to their commitment to motherhood. Singlehood was a determining element for agreeing to undertake a physically and psychologically costly "additional" medical intervention.

Egg donation in the age of vitrification: A study of egg providers' perceptions and experiences in the UK, Belgium and Spain

IVF treatment involving donated eggs increases yearly. Numerous technical and commercial transformations have reshaped how eggs are retrieved, stored and managed. A key transformation is vitrification; a 'fast freezing' method that allows efficient preservation of eggs, and therefore more flexibility in use, giving rise to new commercial possibilities. There has been limited focus on egg providers' experiences in the context of vitrification and related commercialisation. We report findings from a study in the UK, Spain and Belgium, where we interviewed 75 egg providers. Comparing experiences within different donation 'regimes' allows an exploration of how varying national practices and policies shape information-giving and women's experiences. In the UK, a system of 'informed gift-giving' was described, where egg providers saw their actions as not-for-profit and felt relatively well informed. In Belgium, the system was presented as 'trusted tissue exchange': with less information-giving than in the UK, but clinics were trusted to act responsibly. In Spain, a 'closed-door, market-driven' system was described, whereby egg providers received little information and expressed concerns about generation of excess profit. Our findings extend understandings of how egg donation is managed at the national level and how donation regimes produce specific experiences, expectations and subjectivities amongst tissue providers.

Which assisted reproductive technology (ART) treatment strategy is the most clinically and cost-effective for women of advanced maternal age: a Markov model

Objective

To evaluate the clinical and cost-effectiveness of preimplantation genetic testing for aneuploidy, social freezing, donor and autologous assisted reproductive technology (ART) treatment strategies for women aged 35–45 following 6–12 months of infertility.

Methods

Four Markov decision-analytic models comprising: (i) Preimplantation genetic testing for aneuploidy (PGT-A); (ii) autologous ART from age 40 using oocytes cryopreserved at age 32 (social freezing); (iii) ART using donated oocytes (donor ART); (iv) standard autologous ART treatment (standard care) were developed for a hypothetical cohort of 35 to 45 years old ART naïve women with 6–12 months of infertility. Input probabilities for key parameters including live birth rates were obtained from the available literature. Deterministic and probabilistic sensitivity analyses were conducted to address uncertainty in estimating the parameters and around the model’s assumptions. Cost effectiveness was assessed from both societal and patient perspectives .

Result(s)

For infertile women at age 40 and above, social freezing is the most cost-saving strategy with the highest chance of a cumulative live birth at a lowest cost from a societal perspective. PGT-A and donor ART were associated with higher treatment costs and cumulative live-birth rates compared with the autologous ART. Among the four ART strategies, standard autologous ART has the lowest cumulative live birth rate of 45% at age 35 and decreasing to 1.6% by age 45 years. At a willingness-to-pay threshold of Australian dollars (A$)50,000, our model shows all alternative treatment strategies –PGT-A, social freezing and donor ART have a higher probability of being cost-effective compared to the standard autologous ART treatment. However, higher out-of-pocket expenditure may impede their access to these alternate strategies.

Conclusion

Given current evidence, all alternate strategies have a higher probability of being cost-effective compared to the standard autologous ART treatment. Whether this represents value for money depends on societal and individual’s willingness-to-pay for children conceived with ART treatment.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12913-022-08485-2.

Financing future fertility: Women's views on funding egg freezing

Like other assisted reproductive technology (ART) procedures, the cost of egg freezing (EF) is significant, presenting a potential barrier to access. Given recent technological advancements and rising demand for EF, it is timely to reassess how EF is funded. An online cross-sectional survey was conducted in Victoria, Australia and was completed by 656 female individuals. Participants were asked their views on funding for both medical and non-medical EF. The median age of participants was 28 years (interquartile range 23-37 years) and most participants were employed (44% full-time, 28% part-time, 33% students). There was very high support for public funding for medical EF (n = 574, 87%), with 302 (46%) participants indicating support for the complete funding of medical EF through the public system. Views about funding for non-medical EF were more divided; 43 (6%) participants supported full public funding, 235 (36%) supported partial public funding, 150 (23%) supported coverage through private health insurance, and 204 (31%) indicated that non-medical EF should be self-funded. If faced with the decision of what to do with surplus eggs, a high proportion of participants indicated that they would consider donation (71% to research, 59% to a known recipient, 52% to a donor programme), indicating that eggs surplus to requirements could be a potential source of donor eggs. This study provides insights that could inform policy review, and suggests revisiting whether the medical/non-medical distinction is a fair criterion to allocate funding to ART.

Why are they not coming back? A single-center follow-up study on oncological women oocyte's storing for fertility preservation

INTRODUCTION

Oocyte cryopreservation is a valid option for female cancer patients to preserve fertility. The number of patients undergoing fertility preservation (FP) cycles has increased over the past years. Nevertheless, the rates of patients returning to use their cryopreserved material have shown to be considerably low, ranging from 5-8%, but significant data regarding the reasons of such low return rates are scarce.

METHODS

This study is a single-center follow-up retrospective study evaluating the return rate of oncological women who underwent FP at a tertiary care Fertility Center and assessing the reasons influencing the patients who did not return. Data about patients who returned to attempt pregnancy were retrieved from internal registries. Non-returned patients were assessed with a standardized phone survey investigating health condition, marital status and family projects, spontaneous conceptions, and the reasons why they had not returned to use their gametes. A univariate analysis between returned and non-returned patients was performed.

RESULTS

Of the 397 patients who received counseling about FP, 171 (43.1%) underwent oocyte cryopreservation between 2001 and 2017. Nine (5%) died, and 17 (10%) were lost at follow-up. A total of 20 patients (11.7%) returned and 125 did not. In the non-returned group, 37 (29.6%) did not have a partner, 10 (8%) had a previous spontaneous conception, and 15 (12%) had recurrent malignancy at the time of follow-up. In the univariate analysis, younger age at freezing (31.8±6.2 vs. 35.2±4.7; p 0.018), lack of a partner (p 0.002), type of cancer (other than breast cancer; p 0.024) were the significant factors in the non-returned group. As for the personal reason for not coming back, patients mainly answered as follows: lack of a partner (29, 23.2%), the desire for spontaneous motherhood (24, 19.2%), previous spontaneous pregnancies after FP procedures (16, 12.8%), and still ongoing hormonal therapy for breast cancer (13, 10.4%). All patients confirmed their will to keep the storage of their oocytes.

DISCUSSION

The impact of a cancer diagnosis on a woman's maternal desire, sentimental status and life priorities should be studied more thoroughly. Studies investigating hormonal therapy suppression in breast cancer patients seeking pregnancy should be encouraged.

CLINICAL TRIAL REGISTRATION

https://clinicaltrials.gov, identifier NCT05223764.

Employer-Sponsored Egg Freezing: Carrot or Stick?

BACKGROUND

Since 2014, many companies have followed the lead of Apple and Facebook and now offer financial support to female employees to access egg freezing. Australian companies may soon make similar offers. Employer-sponsored egg freezing (ESEF) has raised concerns and there is academic debate about whether ESEF promotes reproductive autonomy or reinforces the 'career vs. family' dichotomy. Despite the growing availability of ESEF and significant academic debate, little is known about how ESEF is perceived by the public. The aim of this study was to explore women's attitudes toward ESEF.

METHODS

Women aged 18-60 years who resided in Victoria, Australia were invited to complete an online, cross-sectional survey investigating views toward egg freezing. Associations between participant demographics and their views about ESEF were assessed using multinominal logistic regression, adjusted for age and free text comments were analyzed using thematic analysis.

RESULTS

The survey was completed by 656 women, median age 28 years (range: 18-60 years). Opinions on the appropriateness of employers offering ESEF were divided (Appropriate: 278, 42%; Inappropriate: 177, 27%; Unsure: 201, 31%). There was significantly less support for ESEF among older participants and those employed part-time (p < 0.05). While some participants saw the potential for ESEF to increase women's reproductive and career options, others were concerned that ESEF could pressure women to delay childbearing and exacerbate existing inequities in access to ARTs.

CONCLUSIONS

Our analysis revealed that while some women identified risks with ESEF, for many women ESEF is not viewed as theoretically wrong, but rather it may be acceptable under certain conditions; such as with protections around reproductive freedoms and assurances that ESEF is offered alongside other benefits that promote career building and family. We suggest that there may be a role for the State in ensuring that these conditions are met.

Decision regret and associated factors following oocyte cryopreservation in patients with diminished ovarian reserve and/or age-related fertility decline

PURPOSE

To evaluate the prevalence and factors associated with decision regret following oocyte cryopreservation (OC) in women with diminished ovarian reserve (DOR) and/or age-related fertility decline (ARFD).

METHODS

A cross-sectional survey study was conducted to five hundred fifty-two women with DOR and/or ARFD who underwent OC between 2014 and 2019 in two private-assisted reproductive units in Istanbul, Turkey. Decision regret was measured using the validated Decision Regret Scale (DRS).

RESULTS

The median and mean DRS scores were 10 (interquartile range: 25) and 13.4 (SD: 13.2, range 0-70), respectively. Eighty-five (52.5%) women reported mild regret and 26 (16%) had moderate to severe regret. Decision regret was inversely associated with the belief in fate regarding childbearing and trust in the efficacy of OC.

CONCLUSIONS

The prevalence of severe decision regret among patients with DOR and/or ARFD undergoing OC is low. Women who had belief in fate and trusted in the efficacy of oocyte cryopreservation had significantly lower decisional regret.

A major increase in oocyte cryopreservation cycles in the USA, Australia and New Zealand since 2010 is highlighted by younger women but a need for standardized data collection

STUDY QUESTION

What are the cohort trends of women undergoing oocyte cryopreservation (OC)?

SUMMARY ANSWER

There has been a dramatic increase in OC cycles undertaken each year since 2010, and the demographics of women accessing OC has shifted to a younger age group, but so far very few women have returned to use their cryopreserved oocytes in treatments.

WHAT IS KNOWN ALREADY

Although OC, as a method of fertility preservation, is offered around the world, global data are lacking on who is accessing OC, who is returning to thaw oocytes and whether these trends are changing.

STUDY DESIGN, SIZE, DURATION

A trinational retrospective cohort study was performed of 31 191 OC cycles and 972 oocyte thaw (OT) cycles undertaken in the USA (2010-2016) and 3673 OC and 517 OT cycles undertaken in Australia/New Zealand (Aus/NZ; 2010-2015).

PARTICIPANTS/MATERIALS, SETTING, METHODS

Data were obtained from the USA Society for Assisted Reproductive Technology (SART) national registry and the Australian and New Zealand Assisted Reproduction Database (ANZARD). De-identified data were requested on all autologous oocyte freeze-all cycles and all cycles where autologous oocytes were thawed to be used in a treatment cycle for the time periods of interest.

MAIN RESULTS AND THE ROLE OF CHANCE

In both the USA and Aus/NZ, there has been a dramatic rise in the number of OC cycles performed each year (+880% in the USA from 2010 to 2016 and +311% in Aus/NZ from 2010 to 2015). Across both regions, most women undergoing OC were aged in their late 30s, but the average age decreased over time (USA: 36.7 years vs 34.7 years in 2010 and 2016, respectively). The number of women returning for thaw cycles was low (USA: 413 in 2016, Aus/NZ: 141 in 2015) and most thaw cycles (47%) across both regions involved oocytes that were frozen for <6 months. In the USA, a higher proportion of cycles resulted in a live birth when only thawed oocytes were used, compared to cycles that combined thawed oocytes with fresh oocytes (25% vs 11%, respectively; P < 0.001). Age at retrieval influenced live birth rate in the USA; 38% of thaw cycles started in women who stored oocytes when aged ≤35 years resulted in a live birth, whereas only 16% resulted in a live birth for women who stored oocytes when aged ≥36 years. Similar data were unobtainable from Aus/NZ.

LIMITATIONS, REASONS FOR CAUTION

There were limitations associated with both the SART and ANZARD data outputs received. The format in which the ANZARD data were provided, and the inconsistencies seen amongst cycle reporting in the SART dataset, restricted data interpretation. For example, both datasets did not provide a clear indication as to why women were undergoing OC and it was not possible to accurately calculate duration of storage for thaw cycles in the USA. We also did not obtain details on embryo quality from either database and acknowledge that embryo quality and subsequent outcome (embryo freezing or discard) would be of interest, especially when considering the efficacy of OC.

WIDER IMPLICATIONS OF THE FINDINGS

The data show that there is widespread demand for OC, and it is increasingly undertaken by younger women; however, the limitations encountered in the dataset support the need for a shift to a more uniform approach to data collection and presentation by large databases, worldwide.

STUDY FUNDING/COMPETING INTEREST(S)

This study received funding from the Fertility Society of Australia to support the ANZARD data extraction. M.J. is supported by an Australian Government Research Training Program Scholarship stipend. The authors declare no competing interests.

TRIAL REGISTRATION NUMBER

N/A.

The marketing of elective egg freezing: A content, cost and quality analysis of UK fertility clinic websites

To the authors' knowledge, this is the first UK-based study to analyse the marketing of elective egg freezing (EEF) by fertility clinics. Analyses were based on the websites of the top 15 UK clinics, which together provided 87.8% of all egg freezing cycles in the UK between 2008 and 2017 inclusive. The analyses included three phases: content analysis; systematic cost analysis and comparison; and quality analysis examining the information available on egg freezing and its adherence to the guidelines of the Human Fertilisation and Embryology Authority (HFEA). The results show that clinics frame EEF according to four main themes: as a new and exciting technology; as a solution to (a modern woman's) life circumstances; as a means to gain control, freedom and more reproductive options; and as a means to avoid the reproductive risks of ageing. This study also found that most clinics are not sufficiently clear and transparent about the 'true' cost of an EEF cycle, present an unbalanced view of EEF, and do not provide satisfactory data or information. Most importantly, none of the clinics adhere adequately to the HFEA guidelines regarding advertising and the provision of information. As the EEF market continues to grow, offered exclusively by private clinics, these findings require urgent attention. Clinics must improve the type and quality of EEF information on their websites such that potential patients can make informed choices, and this article provides 10 basic criteria which can be used as a checklist. It is suggested that the time may have come to grant greater economic regulatory powers to HFEA to avoid overcommercialization of the fertility industry.

Social egg freezing and donation: waste not, want not

The trend towards postponement of childbearing has seen increasing numbers of women turning towards oocyte banking for anticipated gamete exhaustion (AGE banking), which offers a realistic chance of achieving genetically connected offspring. However, there are concerns around the use of this technology, including social/ethical implications, low rate of utilisation and its cost-effectiveness. The same societal trends have also resulted in an increased demand and unmet need for donor oocytes, with many women choosing to travel overseas for treatment. This has its own inherent social, medical, financial and psychological sequelae. We propose a possible pathway to address these dual realities. The donation of oocytes originally stored in the context of AGE banking, with appropriate compensatory mechanisms, would ameliorate AGE banking concerns, while simultaneously improving the supply of donor oocytes. This proposed arrangement will result in tangible benefits for prospective donors, recipients and society at large.

Cracked open: exploring attitudes on access to egg freezing

Egg freezing (EF) technology has improved significantly over the last decade, giving women more choice over their reproductive futures. Despite this advance, EF brings forth contentious ethical and regulatory issues. Policies controlling access to EF vary around the world and there is a lack of consensus about who should have access and what criteria are relevant in making these decisions. This study aimed to identify views of women about access to EF for both "medical" and "non-medical" risks to infertility. An online survey was administered to women aged between 18 and 60 years in Victoria, Australia between April and May 2018. A total of 1,066 individuals initiated the survey. The median age of the participants was 28 years and 81% were <40 years old. Almost all participants (98%) supported access to medical EF in situations where treatments (e.g. chemotherapy) or illnesses threaten fertility. Support for access to EF for non-medical indications was lower; 75% supported EF for "lack of suitable partner", followed by "financial insecurity to raise a child" (72%) and "career/educational advancement" (65%). Older respondents (aged ≥40 years) were less likely than their younger counterparts to support all indications for non-medical EF. Our findings indicate broad support for EF. However, the variation in support between indications for non-medical EF suggests that individuals do not think about access to EF simply in terms of medical necessity. To reflect public views, future policy may need to consider access to EF beyond the medical/non-medical distinction.

Abrahamic traditions and egg freezing: Religious Women's experiences in local moral worlds

In this article, we elucidate how elective egg freezing (EEF) has been received within the three Abrahamic traditions-Judaism, Christianity, and Islam-and how these religion-specific standpoints have affected the EEF experiences of women who self-identify as religiously observant. Through an analysis of religious women's narratives, the study explores the "local moral worlds" of religious women who chose to freeze their eggs for non-medical reasons. It draws on ethnographic interviews with 14 women in the United States and Israel who had completed at least one EEF cycle, and who were part of a large, binational study that interviewed, between 2014 and 2016, 150 women who pursued EEF. These religious women, who were all highly educated, faced a particular challenge in finding appropriate marriage partners. Feeling pressured but still hopeful to marry and create large families, the women used EEF to extend their reproductive timelines and reduce their anxieties. As the study showed, the women reinterpreted or reconciled religious restrictions on the use of EEF in various ways, believing that their ultimate pursuit of religiously sanctioned reproduction justified the means. This study, which is the first to compare Jewish, Christian, and Muslim women's experiences of EEF, illustrates how this novel technology is now shaping the local moral worlds of religious women.

Elective egg freezing and male support: a qualitative study of men's roles in women's fertility preservation

How do men participate in women's fertility preservation decisions and procedures? This binational, qualitative study assessed whether men play supportive roles either before, during or after women's elective egg freezing (EEF) cycles. From June 2014 to August 2016, 150 women (114 in the USA and 36 in Israel) who had completed at least one cycle of EEF were interviewed by two medical anthropologists, one in each country. The majority (85%) of women in the study identified the lack of a male partner as their main reason for pursuing EEF. However, nearly two-thirds (63%) of women relied on some form of male support during their EEF decision making processes and procedures. Five categories of men, in order of support, included: (i) fathers (or other male father figures), (ii) male partners (past or present), (iii) male friends, (iv) brothers and (v) male judges (some of whom supported EEF in divorce settlements). More than a dozen different forms of assistance were offered by men in four major categories: (i) instrumental, (ii) financial, (iii) physical and (iv) psychological. Although one-third (37%) of women went through EEF alone or with only female support, this study reveals the 'hidden' roles men play in supporting the reproductive aspirations of women.

For whom the egg thaws: insights from an analysis of 10 years of frozen egg thaw data from two UK clinics, 2008-2017

PURPOSE

To better understand the characteristics of patients who returned to thaw their frozen eggs to attempt conception and their outcomes.

METHODS

A retrospective analysis of clinical records for all own egg thaw patients in two UK fertility clinics across 10 years, 2008-2017.

RESULTS

There were 129 patients who returned to thaw their eggs, of which 46 had originally frozen their eggs for social reasons and 83 for a variety of clinical, incidental, and ethical reasons (which we have called "non-social"). Women who had frozen their eggs for social reasons were single at time of freeze, with an average age of 37.7. They kept their eggs in storage for just under 5 years, returning to use them at the average age of 42.5. 43.5% were single at time of thaw, and 47.8% used donor sperm to fertilise their eggs. Women whose eggs were frozen for non-social reasons were almost all (97.6%) in a relationship at both time of freeze and thaw. They had an average age of 37.2 at first freeze and 37.6 at thaw, having kept their eggs in storage for an average of 0.4 years. Overall, there was a 20.9% success rate among women attempting conception with frozen-thawed eggs.

CONCLUSIONS

Despite widespread assumptions, many women attempting conception with thawed eggs had not initially frozen them for social reasons. Women who froze their eggs for social reasons presented distinctly and statistically different characteristics at both time of freeze and thaw to women whose eggs were frozen for non-social reasons.

Patient-centered elective egg freezing: a binational qualitative study of best practices for women's quality of care

PURPOSE

How can elective egg freezing (EEF) be made patient centered? This study asked women to reflect on their experiences of EEF, which included their insights and recommendations on the optimal delivery of patient-centered care.

METHODS

In this binational, qualitative study, 150 women (114 in the USA, 36 in Israel) who had completed at least one cycle of EEF were recruited from four American IVF clinics (two academic, two private) and three in Israel (one academic, two private) over a two-year period (June 2014-August 2016). Women who volunteered for the study were interviewed by two medical anthropologists. Interviews were audio recorded, transcribed, and entered into a qualitative data management program (Dedoose) for analysis.

RESULTS

The majority (85%) of women were without partners at the time of EEF, and thus were undertaking EEF alone in mostly couples-oriented IVF clinics. Following the conceptual framework known as "patient-centered infertility care," we identified two broad categories and eleven specific dimensions of patient-centered EEF care, including (1) system factors: information, competence of clinic and staff, coordination and integration, accessibility, physical comfort, continuity and transition, and cost and (2) human factors: attitude and relationship with staff, communication, patient involvement and privacy, and emotional support. Cost was a unique factor of importance in both countries, despite their different healthcare delivery systems.

CONCLUSIONS

Single women who are pursuing EEF alone in the mostly couples-oriented world of IVF have distinct and multifaceted needs. IVF clinics should strive to make best practices for patient-centered EEF care a high priority.