Pregnant women should prioritize essential nutrients like folic acid, iron, calcium, and omega-3 fatty acids. Folic acid is critical for reducing the risk of neural tube defects, while iron supports increased blood volume and combats anemia. Calcium is essential for fetal bone development and overall maternal health. Omega-3 fatty acids are vital for the baby's brain and eye development. Ensuring an adequate intake of these nutrients through a balanced diet can significantly contribute to a healthy pregnancy and fetal growth.