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]] showing the '''Uterus''' in 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 called a [[Menstruation|period]] but is known in [[biology]] as '[[Menstruation]]'.: If the [[female]] does become [[pregnant]] the lining becomes the [[amnion]], [[placenta]] and [[Umbilical Cord|umbilical cord]] to protect and feed the [[foetus]] develops. ===References=======AQA==== :[https://www.amazon.co.uk/gp/product/0008158754/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158754&linkCode=as2&tag=nrjc-21&linkId=27ad53b0283feeff7fc5ae04a9e205f579 ''Uterus, page 208-9, GCSE Biology; Student Book, Collins, AQA '']:[https://www.amazon.co.uk/gp/product/0198359373/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359373&linkCode=as2&tag=nrjc-21&linkId=952a73bbb09d222ecc4b50d200679849 ''Uterus, pages 168-171, 173, GCSE Biology; Third Edition, Oxford University Press, AQA '']