title: [Variants of chromosome compactization and the estimation of the capacity of mammalian oocytes for further development].
abstract: The morphology of chromatin in spontaneously ovulated rat's oocytes was investigated. The degree of chromatin condensation was shown to vary widely: along with the typical cytological picture of metaphase II, both highly condensed (clamped) and decondensed ("not typical") forms of chromosomes were observed. A direct relation was discovered between the prevalence of the not typical morphological forms of oocyte chromosomes and the level of embryonal death. The shape of clamped and decondensed forms increased in the oocytes from old rats and in post-ovulatory aged oocytes.
authors.forename: N M
authors.initials: NM
authors.lastname: Slozina
authors.forename: N A
authors.initials: NA
authors.lastname: Ponomareva
authors.forename: M N
authors.initials: MN
authors.lastname: Linskaia
authors.forename: E G
authors.initials: EG
authors.lastname: Neronova
authors.forename: A I
authors.initials: AI
authors.lastname: Nikitin
mesh_terms: D000375:Aging / Q000502:physiology; D000818:Animals; D002875:Chromosomes / Q000648:ultrastructure*; D020964:Embryo Loss / Q000453:epidemiology; D005260:Female; D014644:Genetic Variation / Q000502:physiology*; D008183:Luteal Phase / Q000502:physiology; D008677:Metaphase / Q000502:physiology; D009865:Oocytes / Q000254:growth & development / Q000648:ultrastructure*; D011247:Pregnancy; D051381:Rats; D011919:Rats, Inbred Strains; D013997:Time Factors
vernacular_title: Varianty kompaktizatsii khromosom i otsenka sposobnosti ootsitov mlekopitaiushchikh k dal'neĭshemu razvitiiu.