Antenal sex determination using amniotic fluid of the baboon (Papio sp.)

Antenatal determination of sex in the baboon was performed by evaluating the percentage of sex chromatin bodies present in the epithelial cells of amniotic fluid obtained during or immediately following cesarean section. Female sex chromatin patterns revealed a mean of 39.2% positive sex chromatin; the mean in males was less than 5%. This procedure is accurate and simple to perform.