When you menstruate is determined by your menstrual cycle, a hormonal domino affect between your brain and reproductive organs. The idea that womens menstrual cycle synchronize is a myth, one womans menstrual cycle cannot change another womans menstrual cycles.
It started in 1964
All girls are different. Some start puberty earlier than others.
You may not have your period every month when you first start. This is because your periods will be irregular.
Yes she dose because you her your period because the egg is not fertilised so an egg has to be there.. If you get me
Most girls will have their first period between the ages of 11 and 14. But some girls will start as early as 8, whilst others may be as late as 17.
The time that cramps start vary with everyone. Some get them days before their period while others get them the day of their period.
You don't. period. They have to learn it eventually on their own.
Because you are prone to it once you start your period.
Everyone is different. Average age is around 12 or 13 but some start at 10 and others at 16. Just be patient.
There are a variety of reasons. First, it could be because you are young, but periods start at different times for different people. I know some people that got it in fourth grade, and others when they were 18. So if you do start late, it's nothing to be ashamed of
It is because your vaginal wall is spreading apart and is getting ready for the cycle to start again.
Yes it's fine to start your period when you were nine because usually girls start their periods at age 8 to age 12. Yes it's fine to start your period when you were nine because usually girls start their periods at age 8 to age 12.