Fertility studies reveal low egg usage and endometrial preparation benefits

A study conducted by researchers at the University of California, Los Angeles (UCLA) involving over 16,000 cycles in the United States indicates that elective egg freezing has a low utilization rate. Data from the SART-CORS database between 2014 and 2021 shows that while elective freezing cycles quadrupled, only 5.7% of women who froze their eggs between 2014 and 2016 returned to use them five to seven years later. The usage rate was slightly higher among women who froze eggs later in life, specifically between the ages of 38 and 42.

In a separate study presented at the American Society for Reproductive Medicine (ASRM) annual congress, researchers from the IVI Institute found that natural cycle endometrial preparation may improve reproductive outcomes for women with overweight or obesity. The research suggests that when transferring euploid embryos, women using a natural cycle—where the body produces hormones physiologically through ovulation—experienced better pregnancy and live birth rates compared to those using artificial or substituted cycles involving medication.