Pregnancy refers to a time where one or more offspring grows inside the womb of woman. A multiple pregnancy comprises more than one offspring, such as twins. Pregnancy generally occurs through sexual intercourse. It can also occur through assisted reproductive technology procedures. Nutrition is crucial while a woman is pregnant to maintain healthy development of the fetus. Nutrition at the time of pregnancy differs from the non-pregnant state. There is a need of specific micronutrients as well as increased energy. Sometimes, pregnant women might need to consult a doctor, if they have food allergies, specific religious/ethical beliefs and other medical conditions. During pregnancy, women should consume ample amount of healthy fats, lean protein, whole grains, vegetables and fruits. Foods rich in nutrients such as iron, vitamin D, folate and folic acid, protein and calcium should also be consumed. This book covers in detail some existent theories and innovative concepts revolving around nutrition and its role during pregnancy. It will serve as a reference to a broad spectrum of readers.