Required number of blastocysts transferred, and oocytes retrieved to optimize live and cumulative live birth rates in the first complete cycle of IVF for autologous and donated oocytes.

The LBR and CLBR were optimized for oocyte recipients when eight oocytes were retrieved (63.6%; 87.9%); at most, fourteen oocytes should be assigned to avoid freezing surplus blastocysts. Thirteen autologous oocytes (69.2%; 92.3%) were ideal for optimization. CLBR optimized after three blastocysts in donor oocytes (81.8%) and four for autologous oocyte patients (80.9%). Our outcomes are valuable for doctors and infertile couples, and they give us information on what we can expect from a first complete IVF cycle.