Periood on nt menstruaaltsükli osa, kui naine veritseb tupest paar päeva ja enamiku naiste puhul juhtub see umbes iga 28 päeva tagant, kuid on tavaline, et perioodid on sellest erinevad, st iga 23 päeva tagant kuni iga 35 päeva tagant.
A period is the part of the menstrual cycle when a woman bleeds from her vagina for a few days, and for most women this happens every 28 days or so, but it's common for periods to be more or less frequent than this, ranging from every 23 days to every 35 days.
