When To Worry
Though morning sickness is rarely harmful, about one in 100 women suffer from hyperemesis gravidarum -- a condition in which pregnancy-induced vomiting is so severe that it causes dehydration and weight loss. Call your doctor immediately if you become dehydrated (you don't produce urine, or urine is dark yellow), you feel dizzy or faint, your heart races, or you vomit blood. In most cases, the condition can be successfully treated with intravenous fluids and antivomit medications. "As long as you get prompt treatment, you and your baby will be just fine," says Nicole Yost, M.D.