You are either not old enoguh yet, or you are pregnate. Or you are a male ^^
The starting AND ending of your periods. :)
rows. the vertical columns are called periods
7 periods
No - only mammals have periods.
periods, they are periods
they dont have periods.
Periods have same shells. There are 7 periods in periodic table.
The main dinosaur periods were the Triassic, Jurassic and Cretaceous periods. they were in the mesozoic era. there were other periods before dinosaurs like the carboniferous.
your periods can be influenced by the people around you........ but this is hormonal .......periods are not contagious like a cold or the flu
rabbits don't have periods.
Birds do not have periods. They lay eggs.
No. Dragons are not mammals. Therefore, they do not have periods.