About the Uterus
The uterus is a very strong, elastic and hollow organ that is central to the female reproductive system. Its primary function is to hold and nourish a fetus, as it develops from a fertilized egg, implanted in the uterine lining, to a full-term unborn baby.
Normally, it is about the shape and size of a closed fist, but towards the end of a pregnancy, it can stretch to the size of a small watermelon, and contract to push a baby out of the body through the small cervical opening and birth canal.
The inside of the uterus is lined with a layer of bloody tissue called the endometrium. The endometrium thickens and sheds in cycles, in response to menstrual hormones. This is what’s known as a woman’s period. Each month, a fertilized egg may implant in the lining, which would trigger the start of a pregnancy. The endometrium would then cushion and nourish the embryo as it grows, instead of shedding.