[Natural family planning].
Härtel
S
S
Ambulant-Medizinischer Versorgungsbereich II, Gesellschaft für Sozialhygiene, DDR.
Neumann
H G
HG
D001833:Body Temperature Regulation / Q000502:physiology; D002582:Cervix Mucus / Q000032:analysis; D005193:Family Planning Services / Q000379:methods*; D005260:Female; D006801:Humans; D012252:Natural Family Planning Methods; D010061:Ovulation Detection / Q000379:methods; D011247:Pregnancy
Natürliche Familienplanung.