Even if you typically eat a fairly healthful diet, pregnancy requires some adjustments. You need extra nutrients to keep up with the demands of your changing body and growing baby, and you should avoid certain foods altogether. This doesn't mean you must follow a stringent regimen--or deny yourself--but it does mean giving a little extra thought to your food choices.
Eating well: what's in it for baby
Organ development The heart, liver, lungs, kidneys and nervous system develop from scratch. Your body supplies the raw materials for all this manufacturing through what you eat.
Brain development Since protein, calories and omega-3 fatty acids are particularly crucial to optimal brain development, ensuring an adequate intake of these nutrients becomes even more vital in the last months of pregnancy when your baby's brain has its greatest growth spurt.