In the first 4 months of pregnancy, the fetus increases in size and the uterus also increases in size, but it is only in the pelvic cavity and does not protrude from the pelvis. At the age of 4.5 months, the uterus will be slightly protruding and the pelvis can be seen to be slightly enlarged from the appearance. During this period, you can enhance the nutrition in moderation, because at this time the pregnancy reaction has stopped and the fetus is growing more rapidly, you should eat more fresh fruits, vegetables, milk, lean meat, egg yolk. You also need to supplement calcium in time, the fetus grows faster at this time, if the lack of calcium will lead to leg cramps or back pain, leg pain and other symptoms of pregnant women.