Antenatal prediction of sex

Current recommendations suggest that prospective parents be informed of the fetal sex following an amniocentesis--if the parents express a desire for that information. Genotype does not in all cases accurately predict the appropriate sex of rearing. A case is discussed involving an infant with ambiguous genitalia who prior to birth had been designated a male, based on genotype obtained following amniocentesis. Caution is urged in predicting sex antenatally.