Undernutrition in pregnant women may result from low intake of dietary nutrients owing to either a limited supply of food or severe nausea and vomiting known as hyperemesis gravidarum (12). This life-threatening disorder occurs in 1–2% of pregnancies and generally extends beyond the 16th week of gestation (12). Pregnant women may also be at increased risk of undernutrition because of early or closely-spaced pregnancies (13). Since pregnant teenage mothers are themselves growing, they compete with their own fetuses for nutrients, whereas short interpregnancy intervals result in maternal nutritional depletion at the outset of pregnancy.