This graph can be used to predict chances of at least 1 live birth for a given number of oocytes.

Oocytes frozen at age 30 years have about a 15% live birth potential each. At age 36 this drops to about 10% per oocyte and by age 39 to 5% per oocyte. This graph assumes each oocyte has an independent chance of becoming a live birth. In reality we tend to see some groups of oocytes all do well and some do poorly upon thaw.

Oocytes from oocyte donors typically have about a 15% LBR per oocyte. LBRs of 20% per oocyte can likely be achieved with very skilled embryologists doing the oocyte vitrification and thaw.