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Updated: Oct 17, 2026

Microsatellite DNA Genotyping and Flow Cytometry Ploidy Analyses of Formalin-fixed Paraffin-embedded Hydatidiform Molar Tissues
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Microsatellite DNA Genotyping and Flow Cytometry Ploidy Analyses of Formalin-fixed Paraffin-embedded Hydatidiform Molar Tissues

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Trisomy 21 fetus co-existent with a partial molar pregnancy: case report

J P Geisler1, C S Mernitz, A K Hiett

  • 1Department of Obstetrics and Gynecology, St. Vincent Hospitals and Health Services, Indianapolis, Indiana, USA.

Clinical and Experimental Obstetrics & Gynecology
|February 11, 2000
PubMed

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During meiosis, chromosomes occasionally separate improperly. This occurs due to failure of homologous chromosome separation during meiosis I or failed sister chromatid separation during meiosis II. In some species, notably plants, nondisjunction can result in an organism with an entire additional set of chromosomes, which is called polyploidy. In humans, nondisjunction can occur during male or female gametogenesis and the resulting gametes possess one too many or one too few chromosomes.When...
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