How common is persistent nausea and vomiting (NVP) during pregnancy?
Nausea and vomiting occurs in 45 percent to 50 percent of all pregnancies. Persistent nausea and vomiting associated with weight loss, fluid/electrolyte imbalance and metabolic disturbances (better known as hypermesis gravidarum) occurs in 1.5 percent to 3 percent of pregnancies. More common in first pregnancies, NVP occurs in the first trimester and early second trimester and is usually resolved by 15 to 16 weeks of gestation.
