Final answer:
Amniocentesis is the procedure of withdrawing amniotic fluid for laboratory examination. It involves inserting a needle into the amniotic sac to collect a sample of fluid containing fetal cells.
Step-by-step explanation:
The procedure of withdrawing amniotic fluid for laboratory examination is known as Amniocentesis. During this procedure, a thin needle is inserted through the mother's abdomen into the amniotic sac to collect a small amount of amniotic fluid. This fluid contains fetal cells and other substances that can be examined to assess the genetic health of the baby.