How successful is egg freezing? Fertility clinics don’t have to say

Clinics that publish success data can apply for a CFAS compliance seal, but only three, all of them private, have one: Ottawa Fertility Centre, Pacific Centre for Reproductive Medicine, and Olive Fertility in B.C. The seal indicates statistics are presented in a standardized way, but allows success to be based on “clinical pregnancy” — the first early sign of pregnancy captured by ultrasound, which is not the same as a live birth.