A reader writes:
I can't believe I was wasting time surfing your site during a break from studying congenital adrenal hyperplasia for my MD boards *at the exact moment* you brought up CAH. I share your moral disturbance that parents may try to find an in utero cure for CAH (more specifically 21-α-hydroxylase deficiency - there are two other enzymatic varieties of CAH). In fairness, however, it is important to note that ambiguous genitalia, virilization and (maybe!) lesbianism are not the biggest health risks from living without 21-α-hydroxylase.
CAH has vast, wide reaching health side effects, far beyond the slight virilization effects that increase incidence of "nontypical" feminine behavior. It is not the gay "gene"; it is a legitimate pathological condition that upsets the natural balance of hormones in the patient that can cause massive electrolyte imbalances, arrhythmias, hypertension, and appearance issues. Attempts to cure/prevent it should most definitely not be considered a "final solution."
Think about it this way: If you had a weird lethal tumor, and a side effect of it was to increase the likelihood that you were gay, would fixing that be a "final solution?"