Which of the following is a common symptom experienced during the first trimester of pregnancy?

During the first trimester of pregnancy, one of the most prevalent symptoms that many women experience is nausea and vomiting, commonly referred to as "morning sickness." This condition is attributed to hormonal changes, particularly the increase in human chorionic gonadotropin (hCG) and estrogen levels, which can affect the gastrointestinal system. The onset of nausea typically occurs around the sixth week of gestation and can last until the end of the first trimester or even into the second trimester for some women.

Nausea and vomiting can be mild or severe, with varying degrees of impact on a woman’s daily life. While the exact cause remains multifactorial, it is crucial to recognize this symptom as a common part of many pregnancies, distinguishing it from symptoms that may arise later in pregnancy or are less associated with the early stages.