Causes of Morning Sickness:
Experts don’t know for sure what causes hyperemesis gravidarum.
However, rising hormone levels are most likely what causes it.
- Specifically, HCG (human chorionic gonadotropin),
- which your body makes during pregnancy very quickly and in large amounts.
2. HCG levels peak around 10 weeks of pregnancy,
- which is when most people report having the most severe symptoms.
3. Estrogen, another hormone that increases during pregnancy,
- may also play a role in causing nausea and vomiting.