Thickness of vitelline membrane is about
$10Å$
$30Å$
$50Å$
$60Å$
Menstrual cycles ceases : Menopase :: First menstruation begins :
Rapid secretion of $LH$ in ovulation causes
Failure of descending testis into scrotum is known as
A hatching egg of chick is covered by plaster of paris. It is harmful for
After ovulation the graafian follicle becomes an endocrine organ called