title: [Primary sex ratio in mammals].
mesh_terms: D000818:Animals; D004622:Embryo, Mammalian; D005260:Female; D007621:Karyotyping; D008297:Male; D008322:Mammals; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D008808:Mice, Inbred CBA; D012744:Sex Ratio; D013045:Species Specificity
vernacular_title: Pervichnoe sootnoshenie polov u mlekopitaiushchikh