Seasonal conception by women in various age groups compared with the season of menarche.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D003267:Contraception; D003718:Denmark; D005260:Female; D006801:Humans; D008572:Menarche; D011247:Pregnancy; D011253:Pregnancy in Adolescence; D012621:Seasons