Placenta secretes
$HCG$ (Human Chorionic Gonadotrophin)
Human placental lactogen
Oestrogen
All of the above
Explain primary concept of male and female reproductive system.
Onset of menstruation is due to
A freshly unfertilized egg of hen contains
Meroblastic cleavage is
Prostate gland surrounds the $...A....$ It produces milky, slightly alkaline solution which forms $...B..$ volume of the semen. The secretion contains $...C...$ acid and enzymes (acid phosphates, amylase pepsinogen and prostaglandins). $A$, $B$ and $C$ in the above statement is