In 20 percent of infertile couples, both the man and woman have reproductive difficulties, and in the remaining 40 percent the man is fully fertile but the woman is not. The most significant cause of the widespread infertility epidemic is that women are waiting longer to have children. A woman's fertillity decreases between the ages of 20 and 35, and then dramatically drops thereafter. In men, poor sperm production is usually genetic in origin and is also on the rise due to spontaneous mutations. Endometriosis is a condition caused by leakage of the uterine lining cells into the abdominal cavity during menstruation, and has been widely touted as a primary cause of infertility.
Severe endometriosis can cause infertility.
However, there is no valid research indicating that treatment of mild to moderate endometriosis results in greater conception rates. However, as a woman gets older, even before menopause, the likelihood that she can produce eggs capable of resulting in a baby decreases significantly. So donor eggs may also be required for these women also. A new solution for the young woman who does not anticipate starting a family for many years, but who wants her own genetic child, is ovarian tissue freezing. A normal sperm count offers the best chance for natural conception, because only a small percentage of millions of sperm in the ejaculate reach the fallopian tube, where the egg can be fertilized.