Constipation in Pregnancy, How to overcome it?

increase the intake of fluids (preferably water) and dietary fiber. The latter may be achieved by consuming more vegetables and fruit and whole meal bread, and pulses such as baked beans and chick peas. The routine non-medical use of laxatives is to be discouraged as this may result in bowel action becoming dependent
And If those stuff didn't work, Consult Your doctor or midwife.

The Cause of this constipation is: decreased bowel motility secondary to elevated progesterone (normal in pregnancy), which can lead to greater absorption of water.