MEDICAL ANIMATION TRANSCRIPT: Pregnancy is the time period during which a baby develops inside your uterus. It usually lasts about forty weeks starting from the first day of your last menstrual period. These forty weeks are grouped into three segments, called trimesters. The second trimester goes from week fourteen through the end of week twenty-seven. At the beginning of the second trimester, your baby, now called a fetus, is around three inches long from head to rump. Around this time, your baby’s eyelids close, and the sex organs begin to form on the outside of the body. By week sixteen, your baby grows to be about five inches long. Fine hair, called lanugo, begins to develop on the head, and the mouth begins to make sucking motions. At twenty weeks, your baby can hear and swallow. And, the baby is more active. You may feel this as a “fluttering” in your lower belly. In the middle of this trimester, you may have an ultrasound exam. It will check your baby’s movement, heart rate, an...