Morning sickness is a common condition experienced by many pregnant individuals, typically occurring in the first trimester. It is characterized by nausea and vomiting, often triggered by certain smells, foods, or even the thought of eating. Despite its name, morning sickness can happen at any time of the day. The exact cause of morning sickness is not fully understood, but it is believed to be related to hormonal changes, particularly the increase in human chorionic gonadotropin (hCG) and estrogen. While it can be uncomfortable, morning sickness usually resolves by the end of the first trimester and is generally not harmful to the mother or baby.