Abstract
More and more women are seeking treatment for infertility,1 probably in part because they are postponing childbearing until an age when their ability to conceive is diminished. The number of office visits to U.S. physicians for infertility services rose from 600,000 in 1968 to about 1.6 million in 19842. And more women are using medications that stimulate ovulation; the number of prescriptions for clomiphene dispensed by U.S. pharmacies nearly doubled from 1973 to 19913. In 1988 approximately 2 million women reported previous exposure to fertility drugs4.The increased use of ovulation-stimulating medications has caused concern about their . . .