title: Chromatid disjunction in unfertilized ageing oocytes.
mesh_terms: D000818:Animals; D002842:Chromatids; D002875:Chromosomes; D003582:Cytogenetics; D005260:Female; D005306:Fertilization; D008540:Meiosis; D051379:Mice; D010063:Ovum / Q000166:cytology*; D013194:Staining and Labeling; D013997:Time Factors