Menstruation
Menarch
Menarche
The beginning of menstruation is called
The beginning of menstruation is menarche.
Well, the menstruation starts at the age of 12-13 in girls. The term for onset of menstruation is menarche .
The term menarche means beginning of menstruation in girls. The usual age of this is 12 years.
This beginning time is called menarche.
Girls
Beginning as early as age eight in girls-and two years later, on average, in boys--the hypothalamus (part of the brain) signals hormonal change that stimulates the pituitary.
Normal!
No, girls don't need to have menstruated to get pregnant. Ovulation occurs BEFORE menstruation so you can get pregnant before menstruation.
When the uterine lining sheds this is typically called menstruation. Although women on hormonal birth control will experience a faux period in the form of a withdrawal bleed.
Low
The normal time frame for the beginning of menstruation is anywhere from 10 to 16 years old. Some girls start earlier, some later.