It depends on the person. Girls who are exceptionally physically active, such as gymnasts, often skip periods because they push their body to its limits and their weight drops to an unhealthy point.
They don't, their body masses are so low they don't get them. Same with gymnasts.
Interim Periods
No
yes
when is the right time to put copper t as a contraceptive, is it during monthly periods
no, this you be checked by a doctor
Generally speaking no, you need to determine why you are not having monthly periods, but no period usually means you are not ovulating.
The medical term for the monthly flow of tissues from the uterus is menstruation.
Paid once a month (12 pay periods per year)
Paid twice a month (24 pay periods a year)
Yes. it is possible. A woman can have a few periods or even regular monthly periods during pregnancy.
all gymnasts use grips