In addition to nausea and vomiting, morning sickness may be accompanied by a number of other signs and symptoms, including unexplained weight loss, lightheadedness and fainting.

When nausea and vomiting are severe, dehydration may occur. Common signs and symptoms of dehydration that may be noticed by the patient may include:

• Dry or sticky mouth
• Little or no urine output
• Dark urine
• Failure to produce tears
• Sunken eyes
• Lethargy (when dehydration is severe)

Women experiencing any of these signs and symptoms should immediately notify their obstetrician-gynecologist (ObGyn). Their ObGyn may also order certain medical tests to detect signs and symptoms of dehydration, including:

• Ketones (chemicals produced when the body uses stored fat for energy) in the urine
• Increased hematocrit (level of red blood cells)
• Increased pulse rate
• Decreased blood pressure