Define the following terms:
$(1)$ Testosterone
$(2)$ Menstrual flow

In human females,the menstrual cycle can be inhibited by the administration of:

Select the mismatched pair from the following options.

Given below is a flow chart showing ovarian changes during the menstrual cycle. Fill in the spaces by providing the names of the hormones responsible for the events shown.
$\boxed{\text{Primary follicles}}$
$\downarrow \leftarrow \boxed{A}$
$\boxed{\text{Graafian follicle}}$
$\downarrow \leftarrow \boxed{B}$
$\boxed{\text{Ovum}}$
$\downarrow \leftarrow \boxed{C}$
$\boxed{\text{Corpus luteum}}$

What is the other name for the follicular phase in the menstrual cycle?

The time for optimum chances of conception in a woman is . . . . . . starting from the day of menstruation.