title: Contraception after unprotected sex.
mesh_terms: D001695:Biology; D003267:Contraception; D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D003276:Contraceptives, Oral; D003277:Contraceptives, Oral, Combined; D003281:Contraceptives, Postcoital; D003710:Demography; D004703:Endocrine System; D005193:Family Planning Services; D006727:Hormone Antagonists; D006728:Hormones; D007434:Intrauterine Devices; D015735:Mifepristone; D010827:Physiology; D011153:Population; D011157:Population Dynamics; D045167:Progesterone Congeners; D013997:Time Factors
chemical_list: D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D003276:Contraceptives, Oral; D003277:Contraceptives, Oral, Combined; D003281:Contraceptives, Postcoital; D006727:Hormone Antagonists; D006728:Hormones; D045167:Progesterone Congeners; D015735:Mifepristone
keywords: Biology; Contraception; Contraceptive Agents; Contraceptive Agents, Female; Contraceptive Agents, Postcoital; Contraceptive Agents, Progestin; Contraceptive Methods; Demographic Factors; Endocrine System; Family Planning; Hormone Antagonists; Hormones; Iud; Oral Contraceptives; Oral Contraceptives, Combined; Physiology; Population; Population Dynamics; Progestins, Low-dose; Ru-486; Time Factors