Can homosexuality be prevented in the womb?

HOUSTON A group of New York clinicians is gearing this prenatal treatment toward girls and women with a condition called congenital adrenal hyperplasia. CAH is a serious hormonal disruption that sometimes results in ambiguous genitalia.

Previous research has shown that females born with CAH have increased rates of tomboyism and lesbianism. A steroid called dexamethasone, or DEX, has shown some success in preventing this. It's why researchers in this study believe it has promise in preventing girls from turning out to be homosexual or bisexual.