The pubic bone is at the junction of the abdomen and the roots of the thighs of a pregnant woman. The pubic bone is a part of the pelvis and is at the very bottom of the belly, above the opening of the urethra, there are two bones with ligaments and fibrocartilage between them called the pubic bone. Because pregnant women have the influence of the fetus and amniotic fluid, it can cause changes in the shape of the belly, the bone-shaped markers, and the muscle-shaped markers. In the 2nd-3rd month of pregnancy, the head of the fetus gradually increases in size, while the uterus also increases in size. The pubic symphysis undergoes corresponding physiological changes and widens relative to the pre-pregnancy period. Pain caused by separation of the pubic symphysis is tolerable within normal limits. If the pubic symphysis is too large, it will cause ligament strain, edema, and difficult to move, etc. Pregnant women have to take more bed rest. When resting, pregnant women can choose to lie on their backs and put a pillow under their hips, which can make the pelvis anteriorly convex. During pregnancy, you should have regular maternity checkups, and when there is any discomfort, it is recommended to go to the hospital in time.