Fig. 3From: A novel and compact review on the role of oxidative stress in female reproductionFertilization processes of most viviparous and ovoviviparous animals. In most viviparous and ovoviviparous animals, the sperm and oocyte combine at the fallopian tube ampulla. In the picture, the first zygote shows a radiation crown dissolving; the second zygote shows the zona pellucida dissolving; the last zygote shows fertilized eggs and cortical responseBack to article page