The main elements of the reproductive system include the ovaries, the fallopian tubes, the uterus, which is also called the womb, the cervix, and the vagina.

The ovaries are two small glands located on each side of the uterus that produce the hormones: progesterone and estrogen. About every 28 days, an egg is released from one of the ovaries into the nearby fallopian tube. The role of the fallopian tubes is to carry the released egg to the uterus.

When the egg is fertilized on its way to the uterus, it implants into the lining of the uterus and develops into a pregnancy. Your uterus provides a safe place for the fertilized egg to grow and develop into a baby. The lower part of the uterus is called the cervix.

The cervix is a round structure that has a small opening in the center. During the delivery of your baby, your cervix will dilate (or expand) and become your baby's passageway into the birth canal. The birth canal, or vagina, extends from the base of the cervix to the outside of the body.

After labor and delivery, your uterus will still be enlarged. The larger size of your uterus also makes your fallopian tubes sit higher in your abdomen. This position is what makes blocking your fallopian tubes -- through your navel -- possible.