Proliferation of the endometrium of the uterus is controlled by:

The menstrual cycle in a normal adult woman is of (in $days$)

$A$ woman with a typical $28 \; \text{day}$ menstrual cycle is most likely to become pregnant as a result of sexual intercourse on which days of the cycle?

In which of the following conditions is menstruation absent in females?

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.
$\boxed{\text{Primary follicles}}$
$\downarrow \leftarrow \boxed{A}$
$\boxed{\text{Graafian follicle}}$
$\downarrow \leftarrow \boxed{B}$
$\boxed{\text{Ovum}}$
$\downarrow \leftarrow \boxed{C}$
$\boxed{\text{Corpus luteum}}$

Cessation of the menstrual cycle at the age of $50$ is called: