how old is an ovulated oocyte of a 35 year old woman?what consequences does this have?

Answer 1

The primary oocytes form before a woman's birth, so the oocyte of a 35 year old woman is itself 35 years old. The cells can age in a way similar to how a human body ages, with gradual degeneration of integrity and function. This is why the risk of many types of birth defects increases as the mother ages; her eggs are literally less fresh.