title: Cytogenetic investigations on human oocytes and early human embryonic stages.
abstract: The chromosome analysis of undivided oocytes and polyploid embryos within a human in vitro fertilization and embryo replacement program offers a unique opportunity to develop correlations between a successful or unsuccessful fertilization and the maturity of the oocytes or the quality of the sperm. Furthermore, it provides information concerning the origin of chromosomal defects.
mesh_terms: D000328:Adult; D001755:Blastocyst / Q000648:ultrastructure*; D002467:Cell Nucleus / Q000648:ultrastructure; D005260:Female; D005306:Fertilization; D006801:Humans; D007621:Karyotyping; D008677:Metaphase; D009865:Oocytes / Q000254:growth & development / Q000648:ultrastructure*; D011003:Ploidies