The first step of human fertilization involves the penetration of the corona radiata. It is a set of cells that surround the egg cell, an indispensable barrier that not all sperm cells that reach the egg are able to cross.
Read the full article on: What Are the Steps of Fertilization in Humans? ( 84).
By Laura de la Fuente Bitane M.D. (gynecologist), Marta Barranquero Gómez B.Sc., M.Sc. (embryologist), Zaira Salvador B.Sc., M.Sc. (embryologist) and Romina Packan (invitra staff).
Last Update: 11/29/2018
