My mom had terrible hyperemesis gravidarum in both her pregnancies and was hospitalized because of it while pregnant with my sister. My sister and I have heard horror stories about it for years, but she always told us not to worry because it is not hereditary. Lately I keep reading about it running in families and that they think it might be genetic. My mom's sister was never pregnant and my sister and I aren't yet. Obviously I won't know for sure until I'm pregnant, but I'm curious, does HG run in your family?