More and more women are waiting until their 30s and 40s to have children. Actually, about 20 percent of women in the United States now have their first child after age 35. So age is an increasingly common cause of fertility problems. About one third of couples in which the woman is over 35 have fertility problems.

Aging decreases a woman’s chances of having a baby in the following ways:

• The ability of a woman’s ovaries to release eggs ready for fertilization declines with age.
• The health of a woman’s eggs declines with age.
• As a woman ages she is more likely to have health problems that can interfere with fertility.
• As a women ages, her risk of having a miscarriage increases.