Cosntipation affects about half of women at some point or another in their pregnancy. It is characterized by abdominal pain, the passing of hard stools, and infrequent bowel movements. Constipation in pregnancy is generally caused by dehydration, pregnancy hormones, stress, anxiety, low physical activity and a low fiber diet. constipation-during-pregnancy.jpgIt is thought that hormones cause the intestinal muscles to relax, and the pressure of the growing uterus contributes to the problems with constipation.