Where does fertilization occur in the human female reproductive system?

$A$: Fertilizins are glycoproteins present on the surface of the egg membrane.
$R$: They help in the agglutination reaction by interacting with anti-fertilizins on the sperm surface to facilitate fertilization.

What is/are the function$(s)$ of fertilizin?

Fertilizin is a chemical substance produced from

Polyspermy is common in which of the following?

Give scientific reasons: Enzymes are secreted from the cells of trophoblast.