The first day of the menstrual cycle is the first day of the menstrual phase - aka first day of the period/menstruation. The menstrual cycle is called this (rather than ovulation cycle) because menstruation is the most noticeable external sign of the cycle.
Most girls get their first period when their 12.5, so no.
Menstrual period refers to menstruation or your period, which is the start of your menstrual cycle. If you're referring to mid-cycle then midway through the menstrual cycle is typically when a woman would ovulate.
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.
It is most likely normal. A lot of girls have one period then skip a few months before having another one. It takes a while for a girls menstrual cycle to become regular.
Most young girls generally get their first period when they're 11+ years old.
Most girls have their first period at age 12, but it is normal anywhere from age 8 to age 16.
Most girls have their first period at age 12, but it is normal anywhere from age 8 to age 16.
The most possible time to get pregnant is between day 11 and 18 of your menstrual cycle.
Around 2 weeks before and after your period is when you are most fertile (ovultating) and are most likely to get pregnant. I could not quite understand the timing in this question so I put a link below explaining the timing involved in the menstrual cycle in relation to pregnancy. Have a look at the link below (the menstrual cycle) the first day of your period is day 1 on this chart.
In the United States, the average age for a girl to get her first period is 12. This does not mean that all girls start at the same age. A girl can start her period anytime between the ages of 8 and 15. Most of the time, the first period starts about 2 years after breasts first start to develop. If a girl has not had her first period by age 15, or if it has been more than 2 to 3 years since breast growth started, she should see a doctor.
Menstrual periods can be very erratic, especially in younger girls. Most likely, there is no need to worry. A visit to a doctor may be helpful to confirm.