Being 39 weeks pregnant and wanting to poop all the time could be that you are about to give birth, but it could also be simple diarrhea. On reaching 39 weeks of pregnancy, you are already in the range of your due date. 39 weeks pregnant and keep wanting to poop could be that labor is imminent. This feeling of wanting to poop occurs when the fetus moves down into the pelvis in preparation for birth and presses on the bowel and bladder. 39 weeks of pregnancy is also a sign of impending labor if there is significant abdominal pain, bloody discharge seen in the vagina, regular contractions, and rupture of amniotic fluid. Constantly wanting to have a bowel movement at 39 weeks of pregnancy can also be caused by simple diarrhea. When you have a bowel movement, observe whether the number of bowel movements increases as well as the nature of the bowel movement. Determine whether it is a feeling of pressure after prolonged contractions or a feeling of wanting to poop all the time in the absence of contractions. If you feel the urge to have a bowel movement all the time during the 39th week of pregnancy, accompanied by redness, labor pains, water breakage, and contractions, you should go to a regular hospital in time to prepare for labor.