What Causes Nausea in the Third Trimester of Pregnancy?

Although a ten-month pregnancy may seem brief, expectant mothers endure countless hardships. It is widely known that extra caution is required during early pregnancy—especially in the first trimester—since incomplete embryonic development can easily lead to miscarriage. However, concerns remain well into late pregnancy. As the abdomen expands, pregnant women may experience symptoms such as lower back pain and dizziness. So, what causes nausea in late pregnancy?

What Causes Nausea in Late Pregnancy?

Nausea and vomiting are common in late pregnancy and may be related to the fetus’s rapid growth and increased size, which can compress the stomach—leading to gastric distension, indigestion, and other gastrointestinal discomforts. Other possible contributing factors include pregnancy-induced hypertension or liver-related conditions. To help alleviate these symptoms, it is advisable to eat smaller, more frequent meals and engage in appropriate physical activity to promote digestion and nutrient absorption. If symptoms persist despite these measures, prompt medical evaluation is essential: blood pressure should be measured; obstetric ultrasound should be performed; abdominal ultrasound of the liver, gallbladder, pancreas, spleen, and kidneys should be conducted; and blood tests—including liver function tests—should be ordered. Based on the findings, targeted pharmacological treatment may be initiated to relieve nausea, vomiting, and other associated discomforts, thereby safeguarding the course of a healthy pregnancy.

The underlying causes of nausea in late pregnancy vary—and so do the appropriate treatments. If nausea results from dietary factors—such as consuming greasy or cold foods—adjustments to daily eating habits are recommended: emphasize light, easily digestible meals and avoid overeating, which may gradually improve symptoms. If nausea stems from dysregulation of the endocrine system, lifestyle modifications are key: maintain regular daily routines, ensure adequate sleep, and minimize psychological stress.

Patients are advised to follow a light, balanced diet and seek timely medical care upon noticing any abnormalities—to prevent disease progression. We hope this information proves helpful to you.