Sleep is essential for overall health. It becomes all the more important when you are pregnant. But unfortunately insomnia is a very common condition that many women go through when they are expecting. Anything from nausea to nasal congestion to increased urination and anxiety can cause this sleeplessness which is common in the third trimester. According to a study published in the European Journal of Obstetrics & Gynecology and Reproductive Biology more than 60 per cent of pregnant women experienced third-semester insomnia. This may be due to difficulty in finding the right sleeping position as well as anxiety about delivery.