One of the common phases people, especially of women, is headache during pregnancy. Considered as a common complaint during pregnancy, specifically during the first and third trimesters, doctors say it is rarely a signal of a serious problem. During pregnancy, experts say that the possible cause of headache during this time is quite uncertain.

In the first trimester, headaches occur because of hormone changes you experience while in the third trimester, headaches are felt because of your having to carry additional weight and changes in your usual posture.