What about NFP? Unknown risks.
D001695:Biology; D002582:Cervix Mucus; D002584:Cervix Uteri; D019411:Clinical Laboratory Techniques; D003933:Diagnosis; D005193:Family Planning Services; D005835:Genitalia; D005836:Genitalia, Female; D010061:Ovulation Detection; D004364:Pharmaceutical Preparations; D010827:Physiology; D012106:Research; D012107:Research Design; D012648:Self Care; D013812:Therapeutics; D014566:Urogenital System; D014599:Uterus
D004364:Pharmaceutical Preparations
Biology; Cervical Mucus; Cervix; Drugs; Error Sources; Examinations And Diagnoses; Family Planning; Family Planning, Behavioral Methods; Genitalia; Genitalia, Female; Laboratory Examinations And Diagnoses; Laboratory Procedures; Measurement; Natural Family Planning; Ovulation Detection; Physiology; Research Methodology; Self Care; Treatment; Urogenital System; Uterus