First Trimester: What to Expect Week by Week
The first 12 weeks of pregnancy involve major hormonal changes. Most early symptoms are normal — here's what to expect and when to call your provider.
Common Symptoms
Fatigue, nausea (with or without vomiting), breast tenderness, frequent urination, food aversions, and mood swings are all common. Symptoms vary widely between pregnancies.
First Prenatal Visit
Most providers schedule the first appointment between 8 and 10 weeks. Expect a full medical history, blood work, urine sample, and possibly an ultrasound.
When to Call Your Provider
Heavy bleeding, severe one-sided pain, severe vomiting (can't keep liquids down), fainting, or signs of dehydration warrant a same-day call.
Frequently asked
Can I exercise in the first trimester?
Yes, most healthy pregnancies can continue moderate exercise. Discuss specifics with your provider, especially for high-impact or contact sports.
What foods should I avoid?
Raw fish, deli meats unless reheated, soft unpasteurized cheeses, high-mercury fish, raw or undercooked eggs, and alcohol.