Contribution of cumulus cells and serum to the maturation of oocyte cytoplasm as revealed by intracytoplasmic sperm injection (ICSI).
Yamazaki Y, Wakayama T, Yanagimachi R. Contribution of cumulus cells and serum to the maturation of oocyte cytoplasm as revealed by intracytoplasmic sperm injection (ICSI). Zygote. 2001 Nov; 9(4):277-82.