Some of the definite must-haves for a healthy pregnancy are proteins. They are essential for the healthy growth of the foetus and to maintain the mother’s health. Proteins form the building blocks for blood, bones, organs, muscles and tissues. Inadequate protein intake can lead to severe malnourishment. Your daily diet should have an additional 0.5 gms of proteins in the first trimester, 6.9 gms in the second and 22.7 gms in the third trimester. So you need about 78 gms of proteins in the third trimester.