About 10% of pregnant women will have symptoms of depression. Diet can be a factor. Diets low in Omega 3 fatty acids seems to make individuals more prone to depression. Fortunately, most prenatal vitamins contain DHA also known as an omega 3 fatty acids. Omega 3 fatty acids are also found in seafood. Eating high quality seafoods that are low in mercury, such as farm-raised trout, or wild Alaskan Salmon, are also excellent sources of omega 3 fatty acids. Vitamin D deficiency can make you feel more depressed. Vitamin D is the sunshine vitamin. It is formed in your skin from sun exposure. Make sure you get reasonable sun exposure during pregnancy. If you cannot get outside regularly during the day, take 2000 units of Vitamin D a day as a pill. Also to alleviate depression, talk to your friends and family about any issues bothering you. Get regular exercise and eight hours of sleep a night. Most depression leaves with these recommendations. However, if you still struggle with depression, please talk to your OB about it.