There are contractions at 40 weeks, false uterine contractions suggest the possibility of labor in the near future, it is more difficult to determine when the birth will take place, true uterine contractions will be born in about 24 hours. The contractions at 40 weeks may be false contractions or true contractions. False contractions are tightening and hardening of the stomach without pain, and the symptoms will be relieved after resting, which is not a sign of labor, and you can’t predict when the birth will take place. False uterine contractions can sometimes be aggravated into true uterine contractions, stomach tightness, hardness at the same time appear regular paroxysms, paroxysms more and more frequent, longer and shorter intervals, after resting the pain can not be relieved, this is the real labor contractions, may be around 24 hours of labor. 40 weeks of pregnancy has reached the stage of the expected date of labor, to observe the changes in the body, ready to wait for labor, if any discomfort timely medical attention.