You are either not old enoguh yet, or you are pregnate. Or you are a male ^^
The starting AND ending of your periods. :)
Periods are subdivided into periods of time know as epochs.
No, goats do not have periods.
how late can be periods
rows. the vertical columns are called periods
In theory males are not to have periods. Only the females can have periods and give birth.
No dogs don't get periods. Yes dogs do get periods...
7 periods
the periods are the rows
periods, they are periods
No, only mammals can have periods.
No - only mammals have periods.