4 months of pregnancy does not show the stomach, if the obstetrical examination of fetal development equivalent to the normal month, is a normal phenomenon. At the end of the third month of pregnancy, the uterus just out of the pelvis, the bottom of the uterus is often in the pubic symphysis 2~3 transverse fingers, at the end of 4 months the bottom of the uterus in the umbilicus between the umbilicus and the shame, that is to say, at the end of the fourth month, just a little bit of bulge in the lower abdomen, most of them will not be obvious belly, so if the fetal development in line with the normal months of obstetrics is normal, it is normal, and it is okay not to show the belly. Of course, the belly is also related to the small size of the fetus, low amniotic fluid, posterior uterus, pregnant women are thin, etc., and need to be regular obstetric examination. During pregnancy, you should go to the hospital for regular prenatal checkups, and after 4 months of pregnancy, most of the early pregnancy reaction has stopped, and the fetus is growing rapidly, at this time, you should have an appropriate amount of intake of high-quality proteins, calories, micronutrients, and a variety of vitamins, etc., so as to ensure that pregnant women’s nutrition during pregnancy is conducive to the health of the mother and child.