The membranous cover of the ovum at ovulation is:

1. The membranous cover of the ovum at ovulation is Corona radiata. When sperm enters the ovum, it first comes in contact with corona radiata and zona pellucida.

2. Zona radiata is a striated membrane.It is situated next to the yolk of an ovum.

3. Zona pellucida is adjacent to corona radiata.

4. Chorion is an embryonic foetal membrane which forms the placenta.