Current obstetrical studies on smoking in Japan (2). Smoking and preterm labor.
D000428:Alcohol Drinking; D005260:Female; D006801:Humans; D007564:Japan; D007752:Obstetric Labor, Premature / Q000209:etiology*; D011247:Pregnancy; D011248:Pregnancy Complications / Q000209:etiology*; D012306:Risk; D012907:Smoking