Karyotypes were prepared from peripheral blood leukocytes in 18 couples with his-tories of habitual abortions. The Standard chromosome analysis and G-banding techniques were studied. The abnormal karyotypes seen were one case with 20% of 45, XX, -14, -15, t(14/15), one case of 46, XY/45, XY, -21 mosaicism, one case of 45, XX, -14, -21, t(14/21), one case of 46, XX/45, XO mosaicism and one case of 46, XYq+. Many other types of chromosomal abnormalities from many reports in couples with spontaneous abortions are discussed.
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