Eating healthy amounts of protein from a wide variety of sources is an important part of a healthy fertility and pregnancy diet. In fact, protein requirements are raised when trying to conceive and during pregnancy. Protein provides essential amino acids that are the building blocks for cells in the body and help your baby grow. Make sure to include both animal sources and vegetable sources of protein daily. Best Sources: Wild low-mercury fish, grass-fed meats, organic pasture-raised chicken, plain yogurt from grass-fed cows, legumes paried with gluten-free whole grains, omega-3 pasture raised organic eggs, broccoli, kale, nuts, and seeds.