39 weeks stomach has been tight and hard but no obvious pain, is not about to give birth, but false contractions; if the pregnant woman feels a gradual enhancement and regular contractions, lasting 30 seconds or more, with an interval of 5 to 6 minutes, accompanied by progressive disappearance of the cervical canal, the mouth of the uterus dilatation, and fetal prelude part of the descent, then it means that the birth of a child is imminent. If a pregnant woman’s stomach stays tight and hard at 39 weeks, but there is no obvious pain, she is not in labor, but is having false contractions, which are irregular contractions due to the increased sensitivity of the uterine myometrium. If false contractions are more frequent, you may need to use drugs to inhibit contractions, such as nifedipine, under your doctor’s supervision. If the pregnant woman feels a gradual increase in the number and regularity of contractions that last for 30 seconds or more, with a 5-6 minute interval, accompanied by progressive loss of cervical canal, dilatation of the uterine opening, and descent of the fetal preluteal part, it means that labor is approaching. It is recommended that pregnant women must pay attention to maintain deep breathing during contractions, do not yell, and if the phenomenon of swelling and pain in the lower back occurs, you can use your hands to press the lower back to relieve the symptoms. Pregnant women must maintain sufficient physical strength before delivery, and if necessary, need to monitor their blood sugar and blood pressure to prevent hypoglycemia and hypertension. If you have any other questions, it is recommended to consult a professional doctor for guidance.