Morning Sickness Timeline and Management

Typical Timeline of Morning Sickness

• Morning sickness typically begins at 4-6 weeks of pregnancy, peaks at 8-12 weeks, and subsides by week 20 for most women 1
• Onset: Symptoms usually begin at 4-6 weeks of gestation 1
• Extended cases: In some women, symptoms may persist until week 20 or beyond 1

Progression to Hyperemesis Gravidarum

• For 0.3-2% of pregnant women, morning sickness can progress to hyperemesis gravidarum, a more severe condition 1, 2
• Hyperemesis gravidarum is characterized by intractable vomiting 1
• Dehydration and electrolyte imbalances are common in hyperemesis gravidarum 1, 2
• Usually starts before week 22 of gestation 1
• In 10% of cases, symptoms persist throughout pregnancy and occasionally into the postpartum period 1

Management Considerations

• First-line non-pharmacologic approaches include diet modifications, avoiding trigger foods and strong odors, and ginger (250 mg capsule 4 times daily) 1
• If non-pharmacologic approaches fail, pharmacologic therapy may include doxylamine and pyridoxine combinations and H1-receptor antagonists such as doxylamine, promethazine, and dimenhydrinate 1, 3