Is it normal to start experiencing morning sickness at 9 weeks?

Generally, morning sickness begins around week 9 of pregnancy. If no other abnormal symptoms are present, this is considered normal and is primarily related to hormonal changes in the body. However, if vomiting is accompanied by severe dehydration, electrolyte imbalance, or sudden weight loss, it is considered abnormal and requires prompt medical attention. The details are as follows:

Morning sickness at week 9 of pregnancy without other abnormalities is a normal phenomenon. At this stage, rapidly rising levels of human chorionic gonadotropin (hCG) and estrogen can stimulate the gastrointestinal mucosa, leading to gastrointestinal disturbances and causing symptoms such as nausea and vomiting. Many pregnant women may also experience changes in appetite and fatigue. These reactions typically do not interfere with normal eating or rest, gradually improve as gestational age increases, and have no adverse effects on maternal or fetal health.

If morning sickness is accompanied by severe dehydration, electrolyte imbalance, or rapid weight loss, it is considered abnormal. Persistent and severe vomiting can prevent the mother from adequately consuming fluids and nutrients, resulting in symptoms of dehydration such as reduced urine output and dry lips. Prolonged cases may lead to electrolyte imbalances that affect vital organ functions, including the heart and kidneys. A significant drop in body weight in a short period can deprive the fetus of sufficient nutrition, potentially impairing its growth and development, thus requiring timely medical intervention.

During episodes of morning sickness, it is advisable to eat small, frequent meals and choose light, easily digestible foods, avoiding greasy or strong-smelling substances. Maintaining adequate fluid intake helps prevent mild dehydration. If vomiting becomes frequent or any abnormal symptoms develop, do not delay—seek medical care promptly. Under a doctor's guidance, symptoms can be alleviated and proper nutrition maintained to ensure a safe pregnancy.