Egg freezing technology empowers women with improved reproductive autonomy, study shows

Maria J. Smith

The largest U.S. report of elective fertility preservation results to day found that 70 percent of females who froze eggs when they had been younger than 38—and thawed at the very least 20 eggs at a later on date—had a child.

Led by professionals at NYU Grossman College of Medication and the NYU Langone Fertility Centre, the new obtaining was dependent on 15 many years of authentic-lifetime frozen egg thaw results for gals who experienced delayed childbearing and confronted pure, age-relevant fertility decline.

Published on-line May possibly 18 in Fertility and Sterility, the examine also discovered that a sizeable quantity of the ladies examined had much more than a person boy or girl by egg preservation. In overall the analyze stories 211 babies from egg freezing.

In comparison, and utilizing fresh new eggs or embryos from women trying to conceive, at age 40 fewer than 30 p.c acquiring in vitro fertilization (IVF) become pregnant, and less than 20 percent gave beginning to dwell babies as a end result, according to statistics gathered by the Centers for Ailment Regulate and Avoidance (CDC) from the nation’s nearly 500 fertility clinics. Egg freezing and thawing at a later on day offers a larger being pregnant results amount than applying clean embryos throughout assisted reproductive technologies, say the review authors.


Our conclusions drop light on the elements that keep track of with thriving births from egg freezing, which include very careful screening of embryos to be thawed and implanted. A much better comprehending of the reside beginning rate from egg freezing for age-linked fertility decline is necessary to inform patient final decision-producing.”


Sarah Druckenmiller Cascante, MD, analyze guide creator, fellow in the Division of Reproductive Endocrinology and Infertility, in the Department of Obstetrics and Gynecology at NYU Langone


“Importantly, our study is based mostly on precise clinical expertise,” adds Dr. Cascante, “fairly than mathematical modeling with limited information, which is most of what has been printed on the opportunity of births from egg freezing so considerably.” The amount of U.S. women of all ages owning youngsters at more mature ages has been escalating for 3 decades, with evidence that the pattern will go on. Beginning premiums have declined for girls in their 20s and jumped for women of all ages in their late 30s and early 40s, in accordance to the U.S. Census Bureau. The typical age at very first start has risen from 19 many years previous in 1984 to 30 a long time previous in 2021 and is larger in numerous metropolitan locations.

Specialists in just the Fertility Centre have been pioneers in the development of egg freezing technological know-how, with the very first infant born by egg freezing at NYU Langone in July 2005. The heart has seen just about triple the amount of women of all ages setting up egg freezing cycles in 2022 in comparison to 2019. As this national craze increases, far more information are necessary to tell sufferers that seek out to protected their reproductive futures.

Review particulars

Within the examine, 543 clients participated with an ordinary age of 38 a long time outdated at the time of the initially egg freeze, which is older than the exceptional age to freeze eggs (35 years previous or more youthful). These sufferers had 800 egg freezing cycles, 605 egg thaws, and 436 embryo transfers in between 2005 and 2020.

The investigation discovered that, total, 39 p.c of ladies in between 27 and 44 several years outdated, with a bulk concerning 35 and 40 years previous at egg freeze, experienced a least 1 kid from their frozen eggs, which is comparable with age-matched IVF outcomes. Throughout all ages, females who thawed much more than 20 experienced eggs experienced a 58 percent reside start rate, which was profound and surprising as this team provided folks previous their reproductive prime. In truth, 14 clients who froze eggs at the age of 41 to 43 years properly experienced kids from their frozen eggs. As pointed out, women underneath 38 yrs previous who experienced 20 or more experienced eggs thawed attained a 70 p.c dwell birth price for each individual. The length of frozen egg storage did not alter the results rate.

Benefits also confirmed that preimplantation genetic screening with embryos from frozen and inevitably thawed eggs resulted in reduced miscarriage charges and better live birth costs for every transfer. These types of screening also enables for one embryo transfers, yielding singleton pregnancies, which are safer for both equally the mother and youngster, say the authors.

“Our success present real looking anticipations for those people considering oocyte preservation and exhibit that egg freezing technological know-how empowers girls with improved reproductive autonomy,” says study senior writer James A. Grifo, MD, PhD, director of the Division of Reproductive Endocrinology and Infertility and the Fertility Center. “Freezing eggs at a youthful age results in being an option to be one’s have egg donor at an advanced age. As youthful individuals freeze eggs and do much more than just one cycle, the results costs will be even increased than claimed in this examine.”

Dr. Grifo, also a professor in the Section of Obstetrics and Gynecology, cautions that the review was constrained by the variety of clients. Potential bigger scientific tests are underneath way to raise the facts established from which individuals can gain and design their anticipated success charges. He provides that additional research from a assortment of geographic spots and center sorts are also required.

Funding aid for the foundational scientific scientific tests that led to NYU Langone’s clinically successful Egg Freezing and Embryo Banking Software was offered by the Carolyn and Malcom Wiener Basis.

In addition to Dr. Cascante and Dr. Grifo, other clinician-researchers in the analyze were being Jennifer K. Blakemore, MD Shannon M. DeVore, MD Brooke Hodes-Wertz, MD, MPH Elizabeth Fino, MD Alan S. Berkeley, MD Carlos M. Parra, MD and Caroline McCaffrey, PhD. The total staff of embryologists, medical practitioners, nurses, and help staff members at the NYU Langone Fertility Center contributed to the results offered in this examine.


Journal reference:

Cascante, S.D., et al. (2022) Fifteen several years of autologous oocyte thaw results from a massive university-based fertility centre. Fertility and Sterility.

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