Assessing risks of midtrimester amniocentesis.
D000022:Abortion, Spontaneous / Q000209:etiology; D000649:Amniocentesis / Q000009:adverse effects*; D000650:Amnion; D005260:Female; D006470:Hemorrhage / Q000209:etiology; D006801:Humans; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D012306:Risk