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===About the Menstrual Cycle===
: The '''menstrual cycle''' is controlled by the [[hormone]]s; [[oestrogen]], [[progesterone]], [[Luteinising Hormone|luteinising hormone]] and [[Follicle Stimulating Hormone|follicle stimulating hormone]].
{| class="wikitable"
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|[[File:MenstrualCycleGraph2.png|center|500px]]
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| style="height:20px; width:500px; text-align:left;" |A [[graph]] showing changes during the '''menstrual cycle''' in:
: The stages of [[follicle]] growth and [[ovulation]].
: The [[Body Temperature|body temperature]].
: The [[hormone]] levels.
: 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]].
*[[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]].