title: Twinning rate and reproduction failures.
abstract: Spontaneous abortion of one of the zygotes is shown to explain some of the main epidemiologic features of dizygotic twinning: its decrease at higher maternal ages and its spatial and secular variations. Conversely, the dizygotic twinning rate offers a precious tool for the study of the etiology of reproduction failures.
mesh_terms: D000022:Abortion, Spontaneous / Q000453:epidemiology*; D000293:Adolescent; D000328:Adult; D005260:Female; D005298:Fertility; D005313:Fetal Death / Q000453:epidemiology; D005602:France; D006801:Humans; D007231:Infant, Newborn; D008423:Maternal Age; D011247:Pregnancy; D013223:Statistics as Topic; D014427:Twins; D014429:Twins, Dizygotic