title: Investigation of the prenatal sex ratio in man by the method of short-term tissue culturing.
mesh_terms: D002478:Cells, Cultured; D002843:Chromatin / Q000032:analysis; D004622:Embryo, Mammalian; D005260:Female; D005333:Fetus; D006801:Humans; D007621:Karyotyping; D011247:Pregnancy; D012729:Sex Chromosome Aberrations / Q000453:epidemiology; D012730:Sex Chromosomes / Q000032:analysis; D012744:Sex Ratio
chemical_list: D002843:Chromatin