[Natural family planning. International developments, current status, future aspects].
D005193:Family Planning Services; D005260:Female; D005544:Forecasting; D006801:Humans; D007391:International Cooperation; D012252:Natural Family Planning Methods; D010060:Ovulation; D011247:Pregnancy; D014944:World Health Organization
Natürliche Familienplanung. Internationale Entwicklung, derzeitiger Stand, Zukunftsaspekte.