The ability of mother to provide oxygen and nutrients for her baby is a very critical factor for fetal or infant health and for its survival. Mainly failure in supplying the adequate amount of nutrients to meet fetal demand can lead to fetal malnutrition. While deficiencies in nutrition during pregnancy can also result in serious adverse offspring outcomes. Maternal weight gain during and after pregnancy are critical issues for maternal and fetal health as well, having a nutritious diet during pregnancy is good for fetal brain development and it reduces the risk of many birth defects. Good nutrition mainly help balance mood swings and it may also improve labor and delivery as well. Women who do not obtain sufficient nutrients from dietary sources may be at risk of deficiency in some vitamins and proteins that perform important functions.