

Menstruation
Menstruation is a biological phenomenon unique to humans, primates and a small number of bats and elephant shrew species. It first occurs during puberty and it continues until menopause, accompanying most biological females for nearly 40 years of their lives.
Explore the phases of the menstrual cycle below
Menstruation is a biological phenomenon unique to humans, primates and a small number of bats and elephant shrew species. It first occurs during puberty and it continues until menopause, accompanying most biological females for nearly 40 years of their lives.
Explore the phases of the menstrual cycle below


Follicular
Follicles mature, uterine lining thickens
Ovulation
Egg(s) is/are released
Luteal
The follicle is absorbed and forms into the corpus luteum
Menstrual
The Uterine lining sheds and menstrual blood appears























