What Causes Nausea in Pregnant Women?

　　In fact, many women experience significant nausea and vomiting after becoming pregnant. Typically, these symptoms begin around weeks 5–6 of pregnancy and gradually intensify over time. They commonly occur in the morning but usually subside by week 12. So, what causes nausea during pregnancy?

　　What Causes Nausea During Pregnancy?

　　The primary cause of nausea during pregnancy is likely linked to elevated levels of human chorionic gonadotropin (hCG) following conception. For instance, if hCG rises too early or reaches excessively high concentrations, it may trigger early-onset nausea and exacerbate nausea, vomiting, and other pregnancy-related symptoms. Additionally, some women may experience transient hyperthyroidism during pregnancy, leading to nausea or even vomiting. Moreover, heightened psychological stress, anxiety, poor living conditions, or financial hardship can intensify nausea. Nausea and vomiting during pregnancy are normal early-pregnancy reactions and typically do not require specific medical treatment.

　　Preventive measures for pregnant women vary across different stages of pregnancy. In early pregnancy, the main priorities include avoiding radiation exposure, remembering to supplement with folic acid, undergoing regular prenatal checkups, and preventing threatened miscarriage. During the second trimester, emphasis shifts to establishing a maternity health record, performing routine vital-sign assessments, and conducting specialized screenings—including nuchal translucency (NT) ultrasound, maternal serum screening (triple or quadruple test), and four-dimensional color Doppler ultrasound—to detect fetal structural abnormalities.

　　After becoming pregnant, women should also prioritize adequate rest and appropriate physical activity, while maintaining a light, easily digestible diet. We hope this information proves helpful to you.