Independence of the cortex maturation from germinal vesicle material during the maturation of amphibian and sturgeon oocytes.
D000818:Animals; D001001:Anura; D002467:Cell Nucleus; D002473:Cell Wall; D005260:Female; D005306:Fertilization; D005399:Fishes; D066298:In Vitro Techniques; D010063:Ovum / Q000166:cytology* / Q000254:growth & development*; D013045:Species Specificity; D013997:Time Factors