Question

What is the term for the beginning of the menstrual cycle?

Hint:

Menarche is the first menstrual period and signifies the beginning of the menstrual cycle.

Answer 1

Step 1: Definition of menarche.
Menarche is the term used to describe the first occurrence of menstruation in a female. It marks the beginning of the menstrual cycle and usually occurs between the ages of 12 and 14, although it can vary.
Step 2: Conclusion.
Therefore, the onset of the menstrual cycle is called menarche.

Answer 2

Step 1: The very first time a girl gets her period marks the start of her menstrual cycles.

Step 2: This first period is called menarche.

Step 3: It usually happens around age 12–14, though this can vary from person to person.

Answer 3

A physiological angle.
As a girl reaches puberty, her hypothalamus and pituitary gland begin signalling the ovaries to mature and start releasing hormones like estrogen, which in turn triggers the uterine lining to build up and then shed for the first time.
This first shedding, the first visible menstrual bleed, is the event that formally marks the start of the menstrual cycle, and it is given the specific name menarche.