The effects of cigarette smoking, maternal age and parity on the outcome of pregnancy.
D000022:Abortion, Spontaneous / Q000209:etiology; D000328:Adult; D005260:Female; D005313:Fetal Death / Q000209:etiology; D006801:Humans; D007226:Infant Mortality; D008423:Maternal Age; D008425:Maternal Behavior; D008875:Middle Aged; D010298:Parity; D011247:Pregnancy; D011248:Pregnancy Complications / Q000209:etiology*; D012907:Smoking / Q000150:complications*