title: Nicotine and cotinine in the amniotic fluid of smokers in the second trimester of pregnancy.
mesh_terms: D000653:Amniotic Fluid / Q000032:analysis*; D005260:Female; D006801:Humans; D009538:Nicotine / Q000032:analysis*; D011247:Pregnancy; D011725:Pyridines / Q000032:analysis; D011760:Pyrrolidinones / Q000032:analysis*; D011863:Radioimmunoassay; D012907:Smoking; D013997:Time Factors
chemical_list: D011725:Pyridines; D011760:Pyrrolidinones; D009538:Nicotine