Trembling fetal movements in late pregnancy may be caused by a smaller intrauterine range of motion and increased intrauterine amniotic fluid.
As the fetus grows in size in late pregnancy, the range of fetal movement in the uterus becomes smaller, the amplitude of fetal movement also becomes smaller, and the impact on the uterus is smaller, so the mother will feel the trembling fetal movement.
In late pregnancy, the amount of amniotic fluid in the uterus is more, after the amniotic fluid increases, the impact on the uterine wall when the fetus moves is weakened, and the mother will feel the fetal movement is a trembling type.
If you feel the fetal movement is trembling in late pregnancy, as long as you observe the number of fetal movements within the normal range, 3 to 5 times an hour, the fetal movement is rhythmic, it means that the fetus is in the uterus in a relatively good condition. If you are not sure, you can go to the hospital for fetal heartbeat monitoring and have the doctor assess the condition of the fetus.