Fetal bulging at 29 weeks of pregnancy is usually caused by the fetus moving its limbs in the uterus and impacting the uterine wall, or it may be caused by uterine contractions. Generally around 16 weeks of pregnancy, pregnant women can feel fetal movement, but the amount of fetal activity is small, and fetal movement feels like flatulence and bowel movements. At 20-35 weeks of pregnancy, fetal activity is usually more frequent and the amplitude of movement is greater. When the localized limb of the fetus pushes against the anterior wall of the uterus, the pregnant woman will feel a bulge on her stomach and it is a little hard to touch. If there is an overall bulge in the lower abdomen, it may also be caused by uterine contractions. If there are occasional mild uterine contractions, they are generally normal physiological phenomena. If the contractions are frequent and accompanied by abdominal pain and vaginal bleeding, it may be a sign of miscarriage or preterm labor, and immediate medical attention should be sought. Pregnant women are advised to observe the movement of the fetus during late pregnancy, take regular checkups, and go to the hospital if they have any symptoms.