Menstrual cycle

The menstrual cycle is the regular naitural chynge that occurs in the female reproductive seestem (speceefically the uterus an ovaries) that maks pregnancy possible.[1][2]

Feegur shawin the progression o the menstrual cycle an the different hormones contreibutin tae it.


  1. Silverthorn, Dee Unglaub (2013). Human Physiology: An Integrated Approach (6th ed.). Glenview, IL: Pearson Education. pp. 850–890. ISBN 0-321-75007-1.
  2. Sherwood, Laurelee (2013). Human Physiology: From Cells to Systems (8th ed.). Belmont, California: Cengage. pp. 735–794. ISBN 1-111-57743-9.