title: The initiation of labor.
mesh_terms: D000317:Adrenergic alpha-Antagonists / Q000494:pharmacology; D000818:Animals; D002395:Catecholamines / Q000494:pharmacology; D004702:Endocrine Glands / Q000196:embryology; D004837:Epinephrine / Q000494:pharmacology; D004967:Estrogens / Q000502:physiology; D005260:Female; D005333:Fetus / Q000502:physiology; D006801:Humans; D007751:Labor, Induced; D007743:Labor, Obstetric; D009474:Neurons / Q000502:physiology; D009638:Norepinephrine / Q000494:pharmacology; D010121:Oxytocin / Q000502:physiology; D011247:Pregnancy; D011273:Pregnancy, Prolonged; D011374:Progesterone / Q000502:physiology; D011433:Propranolol / Q000494:pharmacology; D011453:Prostaglandins / Q000009:adverse effects / Q000502:physiology; D014599:Uterus / Q000187:drug effects / Q000502:physiology
chemical_list: D000317:Adrenergic alpha-Antagonists; D002395:Catecholamines; D004967:Estrogens; D011453:Prostaglandins; D011374:Progesterone; D010121:Oxytocin; D011433:Propranolol; D009638:Norepinephrine; D004837:Epinephrine