title: Surveillance system of chromosome abnormalities in early embryonic stage of induced abortions.
abstract: Chromosome analysis was made in induced abortions within 12 gestational weeks after the first day of the last menstrual period. There were 22 cases (7.3%) of gross chromosome anomalies in 300 materials. About a half of aberrant embryos were born to mothers who had positive histories of drug treatments or X-irradiation for various reasons.
mesh_terms: D000028:Abortion, Induced; D002869:Chromosome Aberrations / Q000453:epidemiology*; D025063:Chromosome Disorders; D004622:Embryo, Mammalian; D005260:Female; D005333:Fetus; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy; D011248:Pregnancy Complications / Q000188:drug therapy; D013902:Radiography, Thoracic / Q000009:adverse effects