The mechanism of labor is still unclear. The fact that there are still no signs of labor at 39 weeks of pregnancy may be related to the fact that the fetus has not yet entered the womb and the low level of estrogen. 1. The fetus has not yet entered the uterus: this makes it impossible to stimulate the cervix, so labor will be delayed. 2. Low estrogen level: It is not easy to signal labor and cannot produce normal contractions, which also leads to delayed labor. The baby still has not shown any signs of starting at 39 weeks of pregnancy, which is a normal reaction, as labor is considered normal until 37-42 weeks clinically. It is important to monitor the baby’s movements after the first trimester, as well as to regularly monitor the amount of amniotic fluid and the condition of the placenta. If the baby is at risk of intrauterine hypoxia, the pregnancy should be terminated by Caesarean section as early as possible on the advice of the doctor to ensure the safety of the mother and the fetus.