When does nausea and vomiting begin during pregnancy?

After becoming pregnant, a woman’s body gradually undergoes a series of changes, one of which is nausea and vomiting—particularly in the morning—commonly referred to as “morning sickness,” an early pregnancy symptom. So, at what gestational month does nausea and vomiting typically begin?

When does nausea and vomiting begin during pregnancy?

For women with regular menstrual cycles (approximately 28–30 days), early pregnancy symptoms usually appear around six weeks after the last menstrual period—i.e., about 42 days from the first day of the last menstrual period. Common symptoms include nausea, vomiting, loss of appetite, fatigue, dizziness, increased sleepiness, cravings for sour foods, and aversion to greasy or fatty foods. Generally, these early pregnancy symptoms are mild. In most cases, they naturally subside by approximately 12 weeks’ gestation without significantly interfering with daily activities or work. However, fewer than 1% of pregnant women experience severe nausea and vomiting—so severe that they cannot eat or drink, leading to dehydration, electrolyte imbalances, and even neurological symptoms.

Nausea and vomiting in early pregnancy are typically caused by gastrointestinal discomfort resulting from hormonal fluctuations. This is a normal physiological response to early pregnancy. If nausea and vomiting occur frequently, symptoms may be alleviated through distraction techniques—for example, engaging in work, reading, or listening to music—to help adjust psychologically, reduce tension, and thereby ease nausea and vomiting.

Women who have just become pregnant should abstain from sexual intercourse, and maintain proper genital hygiene. During the first few months of pregnancy, it is essential to protect the body from significant trauma or impact. We hope this information is helpful to you.