[The demographic factor in Germany in the 21st century].
Witte
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Kinderklinik, Marien-Hospital Gelsenkirchen GmbH, Virchowstrasse 122, 45886 Gelsenkirchen.
D001723:Birth Rate; D003267:Contraception; D003710:Demography; D005193:Family Planning Services; D005260:Female; D005544:Forecasting; D005858:Germany; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D011247:Pregnancy; D014798:Vital Statistics