An ==Key Stage 3=====Meaning===The [[uterus]] is an [[organ]] in the [[Female Reproductive System|female reproductive system]] where the [[offspring]] develops before [[birth]].{| class="wikitable"|-|[[File:ReproductiveSystemUterus.png|center|400px]]|-| style="height:20px; width:400px; text-align:center;" |A [[diagram]] of the '''female reproductive system'''.|}===About the Human Uterus===: The lining of the [[uterus]] builds up every month to prepare for [[pregnant|pregnancy]]. However, when the [[female]] does not become [[pregnant]] the lining breaks down and exist through the [[vagina]]. This is often called a [[Menstruation|period]].: If the [[female]] does become [[pregnant]] the lining becomes the [[amnion]], [[placenta]] and [[Umbilical Cord|umbilical cord]] to protect and feed the [[foetus]] develops.