Why Do Pregnant Women Feel Morning Sickness? | Scientific Reason Morning sickness is one of the most common symptoms during early pregnancy, but why does it really happen? In this video, we explain the scientific reason behind morning sickness and why pregnant women feel nausea, especially in the first trimester. Learn how hormonal changes, rising hCG levels, and body adjustments play a role in this natural process of pregnancy. If you are curious about pregnancy symptoms, baby development, and