Well, the above advice is good. So i'll just add a little more to it. My doctor mentioned that prenatal vitamins also increases the possibility of constipation.
These are some of things I have been and they have helped.
1. Carry water or real juice (not juice blends with less than 100% juice) and sip on it all the time. I even keep a capped bottle of water by my bed to sip on before going to sleep, whenever I get up to pee at night and first thing when I wake up. The more water you drink the better. Our bodies are about 80% water.
2. I have increased my fiber intake with the following:
-hot oat bran cereal (it takes 2 min to cook)
-old fashioned oatmeal (doctor advise not to eat instant cause most of the fiber is stripped from it)
-bran cereal (twice a day for about three weeks, now I just do 1 a day)
-east rye crisp crackers instead of saltine cause they have 4 grams fiber in 2 crackers.
-i try to eat fruit at every meal (fresh is best)
-i eat lots of fresh baby spinach (cold or hot) and other greens and veggies.
3. I walk whenever I can for exercise.
4. If you can, go to a good chiroprator or massage therapist. Minor adjustments can help sometimes. A good massage helps you relax and is good for more than just constipation.
5. Rubb your tummy in a clockwise motion whenever you can. This can help a little cause is it is the direction your bowels naturally move in.