Uterus <!-- google_ad_client = "ca-pub-2327677141881672"; /* Short title Links */ google_ad_slot = "3055805829"; google_ad_width = 468; google_ad_height = 15; //-->

The muscular organ of a female animal in which a fertilized egg implants and matures through pregnancy. During menstruation, the uterus sheds the inner lining.