Morning sickness is a bit of a misnomer; while morning is the most common time to experience feelings of nausea, morning sickness can be experienced at any point in the day – especially if you are carrying twins. Researchers aren’t entirely sure what causes morning sickness, but there is a general consensus that morning sickness is at least partially related to hCG, (human chorionic gonadotropin), a hormone produced during pregnancy. During a multiple pregnancy, hCG levels are higher than in a singleton pregnancy which explains why episodes of morning sickness tend to be elevated in twin pregnancies. This leaves many moms asking how to cope with morning sickness.