Extend Fertility has released the results of an 8-year comprehensive study on egg freezing success rates, providing new insights into the effectiveness of fertility preservation. The findings, presented at the American Society of Reproductive Medicine Conference in Denver, demonstrate significant success rates and changing trends in egg freezing demographics.
The study, which followed 3,100 unique patients through 4,600 egg freezing cycles between 2016 and 2023, revealed several key trends. Most notably, the average age of patients choosing to freeze their eggs has decreased from 37 years in 2016 to approximately 35 years by 2023, indicating a shift toward earlier fertility preservation.
Among the more than 4,000 thawed eggs analyzed, the study reported a 90% survival rate across all ages, with eggs typically frozen at an average age of 36 years. Genetic testing showed that 50% of embryos created from these eggs were normal, comparable to fresh egg outcomes. Patients typically returned for their first thawed egg transfer at an average age of 40 years, achieving a pregnancy success rate of over 55% (defined as live births or pregnancies past 12 weeks). This success rate is particularly notable when compared to CDC data showing a 31% live birth rate per transfer for 40-year-old women using their own eggs in IVF.
“These findings highlight our practice’s expertise and underscores our commitment to delivering the best in fertility care,” said Nataki Douglas, MD, PHD, Chief Scientific Officer of Extend Fertility. “Despite skepticism around egg freezing, this study proves it’s a reliable, science-backed option. It’s not for everyone, but for many, it’s life-changing and offers real outcomes.”
“From the beginning, we’ve been dedicated to providing a truly different fertility experience. Our approach is all about educating the patient, not selling them,” said Joshua U. Klein, MD, Chief Clinical Officer and Co-Founder. “We want our patients to make empowered decisions about their fertility. Egg freezing can change lives, and we’re committed to making it accessible and understandable for all.”
