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.
Women and girls can become pregnant once they are ovulating. It is generally assumed that the indicator of ovulation is menarche, or the start of the menstrual cycle. However, this does not mean that ovulation has occured for all women. Up to 50% do not ovulate until a year after menarche. One possible indicator is that the menstrual cycle is regular and consistent in flow.It is also possible for some people to ovulate before menarche, meaning pregnancy could occur before any menstruation has occurred.The average age of menarche is more obvious than the age of ovulation, so most studies look at this age rather than that of ovulation. These studies show that the age of menarche in societies where people are well nourished is on average about 13 and in poorer societies 15.
The average age for Argentinians is 30.8 years.
12.5 years old. According to a study published in 2003. Wiki "Menarche" for further details.
The average age of octogenarians is 80 years old.
The average age of octogenarians is 85 years old.
It is 12.
The average age would be thirteen however menstruation is different for every female.
The first menstruation can be as young as 9. In the US the average age for girls to start menstruating is 12.
The average age is 12 and 13 but everyone is different. Girls can get it at 9-15 or earlier or even later but if don't get it by age 15 or16 you should go to the doctor and have a check up he/she will tell you if your OK
The average age for a girl to have her first period is 12.8 years. The moment of the first menstruation is however dependent on a lot of factors an may vary from age 10 to 14 .
18
Well, the menstruation starts at the age of 12-13 in girls. The term for onset of menstruation is menarche .
Girls
Yes. When a woman goes through menopause, her menstruation will end. The average age for menopause is in the early 50's.
Menstruation
it's perfect! u know mostly girls get at the age of 12 or 13.if u are having it's alright!
Menstruation occur at the age of 9 to 16 years old