[Studies in cohabitation--how?].
D000022:Abortion, Spontaneous; D005260:Female; D006801:Humans; D007246:Infertility; D007398:Interpersonal Relations; D008297:Male; D011247:Pregnancy; D012723:Sex; D012736:Sex Education; D012725:Sexual Behavior; D012749:Sexually Transmitted Diseases
Samlivslaere--hvordan