What is a common symptom of pregnancy that typically occurs during the first trimester?

Morning sickness, characterized by nausea and vomiting, is a common symptom experienced by many individuals during the first trimester of pregnancy. This condition often begins around the 6th week of gestation and can last until around the 12th to 14th week, although some women may experience it for a longer duration. The exact cause of morning sickness is not fully understood, but it is thought to be related to hormonal changes, particularly the increase in human chorionic gonadotropin (hCG) and estrogen.

This symptom can significantly impact a woman's quality of life during the early stages of pregnancy but is generally considered a normal part of the experience, indicating the body's adjustment to the pregnancy. Recognizing morning sickness as a typical symptom helps healthcare providers offer appropriate advice and support to manage this condition.

Other options, such as increased energy and stamina, are generally not characteristic of the first trimester due to the physical and emotional adjustments occurring during early pregnancy. Frequent headaches may occur, but they are not as universally recognized as morning sickness and can have various causes unrelated to pregnancy. Understanding these common symptoms allows for better patient care and management during this critical period.