What else can amniocentesis be used to find?
If you're having an amniocentesis, you may ask to find out your baby's sex. Amniocentesis is the most accurate way to determine the baby's gender before birth.
Although it's rarely done, an amniocentesis can also be done during the third trimester of pregnancy to see if your baby's lungs are mature enough for delivery, or to evaluate the amniotic fluid for infection.
From: Pregnancy and Amniocentesis WebMD Medical Reference
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