There are various different factors which may affect the number and quality of blastocysts. The probability of obtaining a good quality blastocyst will increase if a high quality IVF laboratory is used alongside an experienced embryologist. Our practice has shown that for 2 high quality blastocysts, a minimum of 8 donor eggs is typically required.
Blastocyst rate may change by 50-80%, depending on fertilization and warming rate. Ovogene Team always request feedback from partner clinics to analyze all egg donor cycles. We only select the best egg donors, and compare them to historical data from previous egg donation programmes.