| Literature DB >> 3793107 |
H Schmiady, K Sperling, H Kentenich, M Stauber.
Abstract
During an in vitro fertilization (IVF) program 122 inseminated eggs showing polar body extrusion, but neither formation of pronuclei nor cell cleavage were analysed cytogenetically. Nine of these eggs showed prematurely condensed sperm chromosomes of the G1-phase (G1-PCC) besides the haploid set of maternal metaphase II chromosomes. This phenomenon can be explained by the permanent arrest of the oocytes at metaphase II after sperm penetration and hence the continuing presence of cytoplasmic chromosome condensing factors which lead to the induction of PCC in the sperm nucleus. The overall frequency of this aberrant type of fertilization was calculated to be in the order of 3-4% of all in vitro fertilized eggs.Entities:
Mesh:
Year: 1986 PMID: 3793107 DOI: 10.1007/bf00280502
Source DB: PubMed Journal: Hum Genet ISSN: 0340-6717 Impact factor: 4.132