title: [50 years of natural family planning].
mesh_terms: D005060:Europe; D005193:Family Planning Services / Q000266:history*; D005260:Female; D049673:History, 20th Century; D006801:Humans; D008598:Menstruation; D012252:Natural Family Planning Methods; D010060:Ovulation
vernacular_title: 50 lat naturalnego planowania rodziny.