Variations in historical natural fertility patterns and the measurement of fertility control.
D000328:Adult; D000367:Age Factors; D001721:Birth Intervals; D003718:Denmark; D005193:Family Planning Services; D005260:Female; D005298:Fertility; D006801:Humans; D008297:Male; D008393:Marriage; D008875:Middle Aged; D013548:Sweden; D006113:United Kingdom