Changes

'''Menstruation''' occurs at the end of a [[placenta]]l [[mammal]]'s menstrual cycle. There are two types of menstruation:

'''Menstruation''' occurs at the end of a [[placenta]]l [[mammal]]'s menstrual cycle. There are two types of menstruation:

* Overt menstruation, occuring in [[human]]s and [[great apes]], in which the lining of the [[uterus]] is shed and expelled from the body to prepare the uterus for a fertilized [[ovum]]<ref>[http://www.4woman.gov/faq/menstru.htm#4 Menstruation and the Menstrual Cycle, from the US Dept. of Health and Human Services]</ref>;

* Overt menstruation, occuring in [[human]]s and [[great apes]], in which the lining of the [[uterus]] is shed and expelled from the body to prepare the uterus for a fertilized [[ovum]]<ref>[http://www.4woman.gov/faq/menstru.htm#4 Menstruation and the Menstrual Cycle, from the US Dept. of Health and Human Services]</ref>;

* Covert menstruation, occuring in all other placental mammals, in which the lining of the uterus is reabsorbed into the animal's body.

* Covert menstruation, occuring in all other placental mammals, in which the [[endometrium]] is reabsorbed.

==Menstruation and the Bible==

==Menstruation and the Bible==