Morning Sickness and Hyperemesis Gravidarum (HG) Morning sickness affects 70-80% of pregnant women at some point. Morning sickness is a name for nausea caused by the pregnancy hormone human chorionic gonadotropin (HCG) and it can also be known as nausea gravidarum, nausea/vomiting of pregnancy (NVP), emesis gravidarum, and pregnancy sickness. Nausea usually starts around 6 weeks of pregnancy (around two weeks after you miss … Read More