1. The significance of fetal movement Fetal movement refers to the movement of the fetus within a pregnant woman, either actively or passively. Fetal movement is very important for monitoring pregnancy and predicting the date of delivery. It is also one of the important indicators for measuring fetal health. 2. How long does it take to start fetal movement during pregnancy? Generally speaking, fetal movement in the early stages of pregnancy is relatively weak and difficult to detect. By about 20 weeks of pregnancy, most pregnant women can feel obvious fetal movements. However, some pregnant women may not feel it until 22 weeks or later. 3. In addition to the gestational age, there are other factors that affect fetal movement.