Difference between revisions of "Menstrual Cycle"

Revision as of 17:53, 16 November 2018

The menstrual cycle is the changes that happen to the female reproductive system every 28 days.

The menstrual cycle in humans repeats every month.


In the first 6 days of the menstrual cycle the uterine wall leaves through the vagina. This is often called a 'period'.	On day 7 an ovum begins to mature and the uterine wall starts to build back up again.	The uterine wall continues to build up.	The uterine wall continues to build up.

The uterine wall continues to build up.	The ovum is released from the ovary.	The ovum travels down the oviduct.	If the ovum is not fertilised the uterine wall breaks down.


A graph showing the relative thickness of the uterine wall through the 28 days of the menstrual cycle.

The menstrual cycle is a regular change in the organs of the female reproductive system that include ovulation and menstruation (periods).


A graph showing changes during the menstrual cycle in: The stages of follicle growth and ovulation. The body temperature. The hormone levels. The relative thickness of the uterine wall.

@@ Line 52: / Line 52: @@
 : The relative thickness of the [[Uterus|uterine wall]].
 |}
-*[[Oestrogen]] - [[Secrete]]d by the [[ovary|ovaries]] in [[female]]s and causes the expression of [[Secondary Sexual Characteristic|secondary sexual characteristics]] during [[puberty]].
+*[[Oestrogen]] and [[Progesterone]] - [[Secrete]]d by the [[ovary|ovaries]] in [[female]]s and causes the lining of the [[uterus]] to become thicker during the [[Menstrual Cycle|menstrual cycle]].
-*[[Progesterone]] - [[Secrete]]d by the [[ovary|ovaries]] in [[female]]s and causes the lining of the [[uterus]] to become thicker during the [[Menstrual Cycle|menstrual cycle]].
 *[[Luteinising Hormone]] - [[Secrete]]d by the [[Pituitary Gland|pituitary gland]] in [[female]]s and causes an [[ovum]] to be released from a [[follicle]] in the [[ovary|ovaries]].
 *[[Follicle Stimulating Hormone]] - [[Secrete]]d by the [[Pituitary Gland|pituitary gland]] in [[female]]s and causes [[follicle]]s to grow in the [[ovary|ovaries]].