Fertility and Age
It is not fully appreciated that female fertility is dependent upon age. This is because the eggs that a woman carries in her ovaries were all formed long before her birth, while she was a fetus in her own mother’s womb. There is a continual loss of eggs all through youth and middle age, resulting in menopause around age 50 as the eggs run out.
Fertility therefore falls slowly but inexorably from its peak in the mid 20s to essentially zero by age 45, even in the absence of other positive or negative factors. This is extremely important to know in planning pregnancies; if a woman has not conceived by 40, it is unlikely that she will do so.
For this reason, we urge women to consider making their families while in their 20s to mid thirties, rather than risking being unable to conceive easily, or at all, in the late thirties or forties.
Happily, there is a new method to extend fertility well into the 40s and 50s, egg banking.