If you are 40 weeks pregnant and your stomach is tight and hard and you have no pain, this is considered to be labor with premonitory signs, and you are about to give birth. The sign of labor is also the sign of impending labor, which is regular and gradually increasing uterine contractions, commonly known as regular uterine tightness, hardness, and gradually increasing in intensity, manifested by gradually increasing abdominal pain, accompanied by progressive shortening and disappearance of the cervical canal, dilatation of the uterine opening, and the descent of the fetal prelude. Pre-eclampsia is the appearance of some symptoms that indicate the imminent labor before the labor starts, such as irregular contractions, vaginal redness and the feeling of the fetus descending. If you have symptoms of premonitory labor at 40 weeks of pregnancy, it is recommended that you go to a regular hospital to be hospitalized and prepared for the impending labor.