What helps in the penetration of egg by the sperm
Fertilizin
Antifertilizin
Sperm lysin
Fertilization membrane
A blastula which is solid, is known as
Capacitation refers to changes in the
Menstrual flow occurs due to lack of
In the egg of bird, shell and shell membranes are
Which of the following depicts the site of impantation of blastocyst under normal condition?