Yes, a female can have a menstrual cycle at 9 years old. The average age of menarche (first period) is 13 years old, but it is possible for females to enter puberty and start ovulating (thus menstruating) from only 9 years old.
The first menstruation can be as young as 9. In the US the average age for girls to start menstruating is 12.
A girl can start her menstrual cycle from when she is about 9 years old any where through to when she is 16 years old.
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When they are around the age of 13 they get there period or menstrual cycle. You can get this from 9 through to 17. If you don't have it by the time your 17 go see your doctor or ask your mum about what time she got her period.
They can be bred when they have their first heat cycle which can be as early as four months but is more typically around six months. It is generally not recommended to breed a dog on it's first heat.
Female, Age 9. From China
You don't ovulate on the last day or the day after the last day of your menstrual cycle.The last day of your menstrual cycle is the day before your period - the first day of your period is day one of your menstrual cycle. Ovulation occurs two weeks before menstruation, if you had a 28 day cycle that would mean you would ovulate around day 14 of your menstrual cycle.Unless you use fertility awareness method you can't tell when you are fertile or ovulating.
You have no control over when your first menstrual period occurs, and extremely limited ways to influence the cycle (aside from pregnancy).
The answer is yes, but for only part of the heat cycle will a female is receptive to breeding. On average, this phase (called the estrus phase) begins around day 9 or 10 from the initial onset of the cycle. It is only at this point in the cycle when a female will allow and even encourage mating.
The best bet to avoid accidental pregnancy, pyometria, and several types of cancer is to have your female spayed BEFORE her first heat cycle. This usually occurs between 7-9 months of age.
It can happen at any type of age 9 and up mostly or mostly at 7th and up
It differs among girls, but it usually starts around 12 or 13