Ejaculation of semen
Involves rhythmic contractions of striated muscles
Is aided by sympathetic nerve activity
Coincides with feeling of organisms
All the above
An atretic follicle is
The mammalian primitive streak gives rise to
An antrum is the characteristic of ...follicles
The minimum number of barriers present between foetal and maternal blood is present in which type of placenta?
Seminal plasma of humans is rich in