Rae,
Jus fyi, I got tis from the net.
Why do I feel lower abdominal aches?
Your uterus expands as your baby develops, which causes a muscle contraction similar to a menstrual cramp or even a mild labor contraction. At the same time, progesterone slows your digestive tract, which can make you feel bloated and uncomfortable. Many women experience these abdominal aches, which are harmless, but if you have real cramps accompanied by bleeding or are especially severe, it could be a sign of miscarriage, says Dr. Gil Gross, an associate professor of obstetrics and gynecology at Washington University in St. Louis. If you're concerned, call your doctor.