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.
menarche
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.
Well, the menstruation starts at the age of 12-13 in girls. The term for onset of menstruation is 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 onset of menstruation is the biggest thing. This signals that the ovaries are now fertile and capable of bearing a baby.
The onset of menstruation in girls. The increase in the testis size in boys. The growth of hair on pubic regions.
Puberty is a phase where body grows rapidly in short time. This is because of the hormones that are flowing in abundance.The main changes during puberty in girls is the onset of menstruation. While in males it is increase in the size of testis and ejaculation .
In girls, puberty ususally hits by the age of 11/12. The onset of menstruation is a sure sign.
The terms which describes this is menarche. Its the onset of menstruation . The average age is 11-12 years.