During which trimester of pregnancy is an expectant mother more likely to experience nausea?

Nausea during pregnancy, commonly referred to as "morning sickness," is most prevalent during the first trimester. This is largely due to hormonal changes that occur in the body as it adjusts to the pregnancy. The increase in human chorionic gonadotropin (hCG) and estrogen levels during this early stage is closely associated with nausea and vomiting in many expectant mothers. While some women may experience nausea into the second trimester, the majority see a significant decrease in these symptoms as the pregnancy progresses and hormone levels stabilize.

It's important to note that while some may experience nausea throughout their pregnancy or during specific periods, it is the first trimester that is characterized by a higher incidence of these symptoms among pregnant women.