Semi-infarction is not a sign of labor, and there is no definite time frame for when labor will occur after semi-infarction. The development of the fetus may vary depending on the condition of the mother. Semi-involution means that in late pregnancy, the prenatal part of the fetus partially enters the mother’s pelvis, but not yet completely. Semi-infarcted fetuses may revert to an uninfarcted state by a change in maternal position, such as in the case of breech presentation, where the mother usually corrects the position by lying in the knee-chest position. Semi-involution may also progress further from semi-involution to full-involution, so there is no definite time for labor after semi-involution, and the exact time of delivery varies with individual circumstances. However, when the mother feels the fetus descending, sees red, and has irregular contractions, it is mostly a precursor of labor, and the pregnant woman needs to pay attention to it.