In women,the cessation of menstruation occurs at the age of:

$A$ human female experiences two major changes,menarche and menopause,during her life. Mention the significance of both the events.

Which phase of the menstrual cycle in humans lasts for $7-8$ days?

What is the cause of menstruation?

The figure given below illustrates the changes taking place during the human menstrual cycle. Identify hormones $A, B, C, D$ and $E$ from the figure. In the boxes shown in the figure, write the name of the hormone (or hormones) controlling the stage in the human menstrual cycle.

Onset of menstruation is due to