Menarche.
The term used to describe the onset of menstruation during puberty is menarche.Menarche is normally first menstruation, although sometimes women can bleed as a result of hormonal changes rather than following ovulation, but without knowing whether a girl has ovulated or not we assume first bleed is menstruation...menarche.
In girls, puberty ususally hits by the age of 11/12. The onset of menstruation is a sure sign.
The main change is that the testis become larger in size. In females there is onset of menstruation.
There is increase in libido. also onset of menstruation.
For males, there is increase in size of testis. For females there is onset of menstruation.
Onset of menstruation which happens during puberty is termed menarche.
girls start about the age of 10 and boys start an 11 12 13 just depends Menstruation and puberty are inextricably links in females. The onset of the menses is also the onset of puberty.
The terms which describes this is menarche. Its the onset of menstruation . The average age is 11-12 years.
The term menarche describes onset of menstruation. This is usually charachterisic of age 12 or 13.
Well, the menstruation starts at the age of 12-13 in girls. The term for onset of menstruation is menarche .
The size of the breasts also increase. Also there is onset of menstruation.