Why does Fertility Decrease?
The fact is that for a long time now it was not known why fertility decreases with age. Research has focused on two areas: aging of the uterus versus aging of the eggs. The modern technology of egg donation has enabled experts to look at these factors separately. If fertility decreases because an older woman’s uterus is less capable of carrying a pregnancy, then using younger eggs shouldn’t produce very many pregnancies in older women. However, several researches have proven exactly the opposite. Women in their forties, fifties, and even sixties can all achieve very high pregnancy rates with egg donation. This is the proof that fertility decreases with age due to aging of eggs and chromosomes, not aging of the uterus, like some though it was.
