The uterus is a hollow, pear-shaped organ that is the home to a developing fetus. The uterus is made up of three layers of tissue: the innermost layer is called the endometrium, the middle layer is called the myometrium, and the outermost layer is called the perimetrium.
The endometrium is where the fertilized egg implants and grows. The myometrium is a layer of muscle that helps to push the baby out during labor. The perimetrium is a thin layer of tissue that covers the outside of the uterus.
During pregnancy, the uterus enlarges as the baby grows. The endometrium thickens and fills with blood to provide a cushion for the baby.
The myometrium stretches and grows to accommodate the increasing size of the uterus. By the end of pregnancy, the uterus is about 20 times its normal size.
After childbirth, the uterus returns to its non-pregnant state. The endometrium sheds its lining in a process called menstruation. The myometrium shrinks back to its normal size. The perimetrium remains in place to protect the uterus.
The uterus is a vital organ in the female reproductive system. It is where a baby grows and develops during pregnancy.
Without the uterus, there would be no way to carry a child to term. The uterus is also responsible for the expulsion of the placenta and the afterbirth.
Books discussing Uterus
Women's Bodies, Women's Wisdom
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Experts discussing Uterus
Dr. Christiane Northrup, M.D.A visionary pioneer and a leading authority in the field of women’s health and wellness.Dr. Christiane Northrup, a board-certified ob/gyn and former assistant clinical professor of ob/gym at the University of Vermont College of Medicine is a three-time New York Times bestselling author who specializes in women's health. Dr. Northrup is well-known worldwide for her empowering perspective on medicine, one...Learn more about Dr. Christiane Northrup, M.D.