Women over 30, particularly those with polycystic ovary syndrome (PCOS), should consider freezing their oocytes with a target of 20 eggs under normal circumstances, or up to 40 if they are older and have PCOS, to mitigate a decline in ovarian quality while leveraging a naturally abundant reserve.

noli's read

The idea of freezing oocytes after age 30 is based on sound scientific evidence, as confirmed by observational cohort studies, including work from Extend Fertility published in Fertility and Sterility showing that a stock of 20 eggs enables a live birth success rate of over 80%. Data from the London Women's Clinic published in Reproductive BioMedicine Online (an observational study) also confirm that age at the time of freezing remains the key factor for future success. For women with PCOS, it is accurate that the oocyte reserve is naturally very high, thereby facilitating the collection of numerous eggs. However, the claim that their oocyte quality is systematically impaired to the point of needing to target 40 is scientifically exaggerated. A retrospective observational study published in Frontiers in Endocrinology shows that women over 35 with PCOS actually achieve cumulative live birth rates above average, as their large reserve largely compensates for slight variations in quality. Finally, the target of 40 oocytes is more of a personal expert opinion and risks unnecessarily increasing the physical discomfort associated with repeated stimulation in these sensitive profiles.

the sources

No named source held this one up — that absence is part of the verdict.