Morning sickness may be a good thing, at least for the baby. According to research published in Obstetrics and Gynecology (May 2000), British studies indicate that expectant mothers who experience morning sickness are less likely to miscarry or produce premature or low birth weight babies. Restriction of calorie intake due to nausea and vomiting keeps the mother’s rising insulin levels in check, reducing her metabolism of fat and in turn assuring availability of adequate nutrition for the developing fetus.