title: A search for evidence of hereditary superfetation in man.
mesh_terms: D001724:Birth Weight; D005260:Female; D005799:Genes, Dominant; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D008423:Maternal Age; D010298:Parity; D010375:Pedigree; D011247:Pregnancy; D011272:Pregnancy, Multiple; D013476:Superfetation; D014429:Twins, Dizygotic