First, are produced in two almond-shaped organs known as the . During the process of , a mature egg() is released and enters one of two . For a few days the egg cell travels towards the pear-shaped. The lining of this organ thickens in preparation for a fertilized egg. If the egg is not Fertilized by the the male , it will leave the body together with The lining of the uterus and a small amount of blood. This process is called. The lower portion of the uterus is called the and is a common site of cancer in women. The female organ of intercourse is the . A thin membrane is usually present at the entrance of this organ called the. Outside of this organ are folds of skin covered with pubic hair known as the . The development of the reproductive system is triggered by the hormones And , which causes many physical changes in a girl. This Period of change is called,