What is Menstruation?

Menstruation, also known as a menses, menstrual period or period, is when blood and the lining from the uterus (womb), known as the endometrium, flow out through the vagina.

Menstruation is a stage of puberty and is one of the physical signs that the body is preparing for the possibility of reproduction (having a baby).

Menstruation or periods are a part of maturation. Menstruation is repeated through one’s reproductive life.


  • Endometrium – the lining of the uterus.
  • FSH (Follicle Stimulating Hormone), oestrogen, luteinising and progesterone – the main hormones that control the reproduction system.
  • Menarche – the first period.
  • Menopause – the end of menstruation.
  • Menstrual cycle – the process of bodily changes as a result of menstruation.
  • Menstruation, menses, menstrual period, are all names for a period.
  • Ovulation – the process of producing and releasing an ovum.
  • Ovum – the egg produced by the ovary.
  • Reproduction – having a baby.
  • Uterus – womb.


  • Menstruation is also known as menses, menstrual period and your period.
  • Menstruation is when a blood and the lining from the uterus (womb) flow out through the vagina.
  • Menstruation is a stage of puberty.
  • Menstruation usually begins between the ages of 11-14 but can be sooner or later depending on the individual.
  • The menstrual cycle refers to the series of changes that occur in the body that result in menstruation.
  • The period (bleeding) usually lasts between 2-7 days.
  • The menstrual cycle can last anything between 21 and 35 days.
  • Ovulation is the process of producing and releasing an ovum (egg).