There are two surges of estrogen during the menstrual cycle in a female. The first and major surge is recorded during:

Define the following:

Amenorrhea

Which of the following statements are correct regarding female reproductive cycle?

A. In non-primate mammals cyclical changes during reproduction are called oestrus cycle.

B. First menstrual cycle begins at puberty and is called menopause.

C. Lack of menstruation may be indicative of pregnancy.

D. Cyclic menstruation extends between menarche and menopause.

Choose the most appropriate answer from the options given below.

Arrange the phases of the menstrual cycle in the correct order.

$1)$ Proliferative
$2)$ Menstrual
$3)$ Ovulatory
$4)$ Secretory

The graph given below shows the level of the ovarian hormones in a normally menstruating woman during the follicular phase. Name ‘A’ and ‘B’.

Reconstruct the graph showing the level of hormones in luteal phase.

The graph given below shows the level of the ovarian hormones in a normally menstruating woman during the follicular phase. Name ‘A’ and ‘B’.