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Series of biochemical changes in a sperm cell that affect its swimming motion and membrane to allow it to fuse with the egg.
Procedure for detecting fetal abnormalities in which the amniotic sac is punctured with a large hypodermic needle and amniotic fluid is withdrawn into a syringe for analysis.
Chorionic villi sampling
Procedure for detecting fetal abnormalities that involves examination of chorionic villi.
Structure through which the fetus derives its nourishment and rids itself of waste products.
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