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Updated: Jul 13, 2026

Chromosome Screening of Human Preimplantation Embryos by Using Spent Culture Medium: Sample Collection and Chromosomal Ploidy Analysis
Published on: September 7, 2021
[Retrospective molecular-cytogenetic characteristics of tetraploidy in early human embryolethality]
Abstract:
The ploidy level of noncultivated extraembryonic tissues was studied by fluorescence in situ hybridization in 30 human I trimester spontaneous abortions with tetraploid or diploid-tetraploid karyotype after conventional cytogenetic analysis. Only thirteen embryos (43 %) were verified to be tetraploid that provides evidence for the hypothesis of placental cell polyploidization during long-term in vitro cultivation. It is shown that preferred compartmentalization of tetraploid cells in the inner cell mass derivatives is associated with blighted ovum - the most severe type of human embryo dysmorphogenesis.
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