Why do girls have periods

A period is part of the girls' hormonal changes during adolescence, or the puberty stage.Period and pms pain are not similar.The typical menstrual cycle is 28 days long, but each woman is different.Your periods are still regular if they usually come every 24 to 38 days.Every month, in the years between puberty.The uterus lining gets thick in periods so as to make way for the tissues to be released.

Fish do not have periods.After taking postinor or early morning pills.This is the primary reason why girls entering puberty or women approaching menopause have irregular periods.The first period usually begins between the ages of 10 and 14.Every month, women release an ova from the ovary.The accepted 'average' is 28 days.

This protects the woman from infection and keeps only healthy embryos around.The broader context of leviticus.When the eggs have matured, the female will eject them into the water for external fertilization by the male.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 day 21 to day 40 of their menstrual cycle.Menopause is defined as one year without periods.Humans reproduce when a woman gives birth to another human being.