Spermiogenesis is under the control of which hormone?

The process of spermatogenesis is under the regulatory influence of:

What is the condition of oligospermia?

Enzyme required for fertilization of sperm and ovum is located in the ......... of sperms.

When a male ejaculates sperms during coitus,for normal fertility,at least ....... percent of sperms must have normal shape and size,and at least ........... percent of them must show vigorous motility.

Immediately after ovulation,the mammalian egg is covered by a membrane. What is this membrane called?