title: Aging of the ovum.
mesh_terms: D000022:Abortion, Spontaneous / Q000209:etiology; D000663:Amphibians; D000818:Animals; D001831:Body Temperature; D002869:Chromosome Aberrations; D002875:Chromosomes; D000013:Congenital Abnormalities; D004971:Estrus; D005193:Family Planning Services; D005260:Female; D005306:Fertilization; D005865:Gestational Age; D006062:Gonadotropins / Q000502:physiology; D006801:Humans; D007030:Hypothalamo-Hypophyseal System / Q000502:physiology; D008322:Mammals; D008540:Meiosis; D008854:Microscopy, Electron; D010053:Ovary / Q000502:physiology; D010060:Ovulation; D010063:Ovum / Q000502:physiology* / Q000648:ultrastructure; D011247:Pregnancy; D011248:Pregnancy Complications; D012729:Sex Chromosome Aberrations / Q000150:complications; D013997:Time Factors; D014314:Trisomy
chemical_list: D006062:Gonadotropins