title: Twins.
mesh_terms: D000318:Adrenergic beta-Agonists / Q000627:therapeutic use; D001510:Bed Rest; D002585:Cesarean Section; D003906:Developing Countries; D005260:Female; D005317:Fetal Growth Retardation / Q000150:complications / Q000175:diagnosis; D005325:Fetal Organ Maturity; D006801:Humans; D006973:Hypertension / Q000150:complications; D007226:Infant Mortality; D007231:Infant, Newborn; D007234:Infant, Premature; D008168:Lung / Q000196:embryology; D007752:Obstetric Labor, Premature / Q000517:prevention & control; D010121:Oxytocin / Q000627:therapeutic use; D011247:Pregnancy; D011249:Pregnancy Complications, Cardiovascular; D014427:Twins
chemical_list: D000318:Adrenergic beta-Agonists; D010121:Oxytocin