The uterus (also called the womb) is a hollow, pear-shaped organ, situated within a woman's abdomen. Its top end is connected to both fallopian tubes, while at the bottom end is the cervix (or neck of the womb). This muscular organ is where a foetus will develop over the nine-month gestation period.

The uterus is made up of muscle and has a lining called the endometrium. On a monthly basis, this lining builds and thickens in order to cushion and receive a fertilised egg.

If the uterus does not receive a fertilised egg, the lining sheds and this causes the woman to have her period – also known as menstruation.

If the uterus does receive a fertilised egg, it will implant into the endometrium and begin the long process of development. In turn, this will also cause a placenta to form.

In a non-pregnant woman, the uterus measures around three inches long, but has an amazing ability to expand as the baby grows. In fact, the uterus normally weighs around 50g, but by the time a pregnancy reaches full term, it will weigh around twenty times its normal weight!

As well as a function during pregnancy, the uterus also plays a structural role in a woman's body as it gives support to the natural position of the bladder, bowel and pelvic bones.

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