Inner thigh pain in late pregnancy is not a sign of impending labor. As the weeks of pregnancy increase, the pressure on the abdomen is increasing, which may lead to different degrees of back pain, pubic bone separation, pubic bone pain, leg root pain and other problems, so it is a normal physiological phenomenon. Causes of inner thigh root pain: 1. Fetal compression: in the late stages of pregnancy, the fetus enters the pelvis will compress the pelvic floor, resulting in pelvic floor nerve compression and causing pain sensation, which can be manifested as inner thigh root pain. 2. Calcium deficiency: During pregnancy, a large amount of calcium in the pregnant woman’s body is supplied to the fetal bone growth and development, which is prone to osteoporosis, and in the case of osteoporosis, it may lead to inner thigh pain. 3. Separation of pubic symphysis: some pregnant women in the second trimester of pregnancy can be due to thigh muscle, tendon injury or due to hormonal changes, causing separation of the pubic symphysis, resulting in pain in the inner thigh root. 4. Thrombosis: less common, pregnant women overweight compression of the entire pelvis, poor blood circulation, lower limbs of the venous blood flow back to the obstruction of thrombosis, can cause thigh pain in the root of the inner thigh. Late pregnancy inner thigh pain is not a sign of impending birth, if the pain continues to be unrelieved, you should seek medical attention.