Uterine contractions (i.e., uterine contractions) start out irregularly, with weak intensity, and gradually become regular and stronger, with longer duration and shorter intervals. For example, the interval is 2-3 minutes and lasts 50-60 seconds. 2. What does contractions feel like? Irregular contractions occur in the last few months of pregnancy, especially the last few weeks. After fetal movement, as long as you put your hand on your abdomen, you will feel your abdomen become hard from time to time. These contractions are irregular