=Extra-uterine Pregnancy.= Another departure from the normal pregnancy is when the baby develops outside of the uterus. Although in the normal course of events the fertilized ovum travels down the tube and becomes attached to the uterine lining, it is possible for it to stop, and more or less completely develop at any point along the way. This is called an extra-uterine pregnancy, since it occurs outside of the uterus. If the baby develops in one of the ovaries, it is termed an ovarian pregnancy, and a tubal pregnancy if it develops in a tube, this being the most frequent variety of extra-uterine pregnancies. Only about one out of a hundred such pregnancies continue throughout the allotted period, and accordingly, a live baby, capable of living for any length of time, seldom results. To sum up a normal pregnancy, we find that in the course of ten lunar months following the fertilization of an ovum, the uterus grows from a small, flattened pelvic organ, 3 inches in length, to a large muscular sac, about 15 inches long occupying the abdominal cavity. It increases its weight sixteen times, that is, from 2 ounces to 2 pounds, while the capacity of the uterine cavity is multiplied five hundred times. Within the uterus is a baby weighing about 7¼ pounds; a placenta weighing perhaps 1¼ pounds and approximately a quart of fluid. The baby is attached to the placenta by means of a jelly-like cord about as thick as one’s first finger and 20 inches long; baby, placenta, cord and fluid all being contained in a thin, but strong sac frequently called the bag of waters, but by the doctors termed the membranes. The total weight of the uterus and its contents at the end of pregnancy is usually about 15 pounds. Throughout the baby’s life within the uterus, the placenta virtually acts as his digestive organs, lungs, kidneys and bowels. Bear this in mind, and you will realize why, in taking care of yourself you are taking care of your baby while his body is being built and getting itself into running order to take up life as a separate being. The full realization that whatever is good for you is good for your baby will make you eager to give yourself the care that is outlined in the next chapter. CHAPTER V TAKING CARE OF THE BABY BEFORE HE COMES We shall see that taking care of your baby before he is born means taking such care of yourself throughout pregnancy, that you not only keep your own body in its usual good running order, but in addition, so effectively promote the activities of your various organs that you also keep the baby’s body going, his body that is growing all the time.