1. Aplacental VIVIPARITY Aplacental viviparity (which used to be called ovoviviparity) is when animals hatch from eggs, but the eggs hatch and the babies develop inside the female's body

2. Ovoviviparity (Aplacental viviparity) is a mode of reproduction in s harks (and other animals) in which embryos develop inside eggs that are retained within the mother's body until they are ready to hatch