* Myometrial cells contract and shorten, but do not regain their original length upon relaxation.
* Myometrial cells contract and shorten, but do not regain their original length upon relaxation.
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* Reduces the uterine volume and causes retraction of the lower uterine segment and the [[Female_Reproductive_Tract_-The_Cervix_-_Anatomy_%26_Physiology|cervix]] to create a '''birth canal'''.
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* Reduces the uterine volume and causes retraction of the [[Female_Reproductive_Tract_-The_Uterus_-_Anatomy_%26_Physiology|lower uterine segment]] and the [[Female_Reproductive_Tract_-The_Cervix_-_Anatomy_%26_Physiology|cervix]] to create a '''birth canal'''.