Obstetric ultrasonography: Usually warranted to evaluate for multiple gestations or trophoblastic disease
Volume status (eg, mucous membrane condition, skin turgor, neck veins, mental status)
Hepatitis panel
Hematocrit level
Serum levels of electrolytes and ketones
Cardiac evaluation
Thyroid stimulating hormone, free thyroxine levels
Abdominal computed tomography scanning or magnetic resonance imaging: If appendicitis is suspected as a cause of nausea and vomiting in pregnancy
Abdominal evaluation
Thyroid evaluation
Calcium level
Urine culture
Amylase/lipase levels
Urinalysis for ketones and specific gravity
Vital signs, including standing and lying blood pressure and pulse
Neurologic evaluation
Liver enzymes and bilirubin levels
General appearance (eg, nutrition, weight)
Upper abdominal ultrasonography: If clinically indicated, to evaluate the pancreas and/or biliary tree
