Today, in vitro fertilization (IVF) is practically a household word. But not so long ago, it was a mysterious procedure for infertility that produced what were then known as "test-tube babies." Louise Brown, born in England in 1978, was the first such baby to be conceived outside her mother's womb.
Unlike the simpler process of artificial insemination -- in which sperm is placed in the uterus and conception happens otherwise normally -- IVF involves combining eggs and sperm outside the body in a laboratory. Once an embryo or embryos form, they are then placed in the uterus. IVF is a complex and expensive procedure; only about 5% of couples with infertility seek it out. However, since its introduction in the U.S. in 1981, IVF and other similar techniques have resulted in more than 200,000 babies.
Anyone who has struggled with infertility will tell you this: It can be quite the roller-coaster ride. "The hardest thing for us was not having answers," says one woman, now 38. She and her 45-year-old husband were derailed for several years while doctors tried to figure out the cause of their infertility.
Unlike this couple, about 80% to 85% of U.S. couples are able to get pregnant after a year of trying. When you get past the year mark, however, it's time to seek help. If you're over age 35, it's...