Pregnancy comes with a long to-do list — appointments to book, tests to schedule, habits to adjust, and a nursery to prepare — and it’s easy to lose track of what happens when. This trimester-by-trimester checklist lays it all out in order, so you can move through the next nine months feeling organized and confident. Use it as a roadmap and a conversation starter with your provider, not a rigid rulebook, since every pregnancy is a little different.
As Soon As You Know (or Are Trying)
The earliest steps matter most, because so much foundational development happens in the first weeks.
- Start a daily prenatal vitamin with at least 400 mcg of folic acid — ideally a month or more before conception.
- Book your first prenatal appointment (most providers see you around 8–10 weeks).
- Stop alcohol, smoking, and recreational drugs, and limit caffeine to under 200 mg a day (about one 12-oz coffee).
- Review all medications and supplements with your provider or pharmacist for pregnancy safety.
- Note the first day of your last period to help date the pregnancy, and choose a prenatal care provider.
First Trimester (Weeks 1–13)
- Attend your first prenatal visit: expect a full history, a physical, and blood work (blood type and Rh, blood count, immunity checks), plus possibly a dating ultrasound.
- Discuss genetic screening options such as NIPT and first-trimester screening, and decide what’s right for you.
- Manage early symptoms — nausea and fatigue are common; our first trimester survival guide has strategies.
- Learn which foods to avoid (unpasteurized dairy, raw or undercooked meats and seafood, high-mercury fish) — see our guide to safe foods in pregnancy.
- Establish a safe, gentle exercise routine with your provider’s okay — our guide to staying active helps.
Second Trimester (Weeks 14–27)
- Have your anatomy scan (the detailed 20-week ultrasound), usually between 18 and 22 weeks.
- Complete gestational diabetes screening — the glucose test, typically at 24–28 weeks; learn more about gestational diabetes.
- Plan your pregnancy vaccines with your provider — flu in season, plus the timing for Tdap and RSV later on; see our guide to vaccines during pregnancy.
- Start baby prep — consider a minimalist registry and look into childbirth and breastfeeding classes.
- Enjoy the “energy window” and note when you first feel movement — you’ll track it more formally later.
Third Trimester (Weeks 28–40)
- Attend more frequent checkups (often every two weeks, then weekly near the end).
- Start counting your baby’s movements daily from around 28 weeks — see our guide on your baby’s heart rate and movement.
- Get your Tdap vaccine (ideally 27–36 weeks) and the maternal RSV vaccine if recommended (32–36 weeks, in season).
- Have your Group B strep screening — a simple swab done around 36–37 weeks.
- Pack your hospital bag, install the infant car seat and have it checked, and finalize your birth preferences.
- Choose your baby’s pediatrician and, if you plan to, prepare for breastfeeding.
- Learn the signs of labor and the warning signs that mean you should call right away.
Healthy Habits for Every Trimester
Alongside the milestones, a few habits support you the whole way through: take your prenatal vitamin daily, eat a balanced diet built on whole foods with your vitamin as a safety net, stay well hydrated, prioritize sleep and rest, keep moving within your provider’s guidance, and protect your mental health — reaching out for support when you need it. Attending every scheduled appointment is the simplest, most powerful thing on this whole list, since it’s how problems get caught and managed early. If you’re getting organized before baby arrives, our pre-baby checklist covers the practical prep.
Frequently Asked Questions
Most providers schedule your first visit between 8 and 10 weeks, though they’ll want to know as soon as you have a positive test. Call early — if you have certain health conditions or a history of pregnancy complications, they may want to see you sooner.
Common ones include first-trimester blood work (blood type, Rh, blood count, immunity), optional genetic screening, the mid-pregnancy anatomy ultrasound, glucose screening for gestational diabetes at 24–28 weeks, and a Group B strep swab near 36–37 weeks. Your provider tailors the schedule to you.
A typical schedule is about every four weeks until 28 weeks, every two weeks from 28 to 36 weeks, and then weekly until birth. Higher-risk pregnancies may need more frequent visits.
Aim to have it ready by around 36 weeks, since labor can start earlier than expected. Keep it somewhere easy to grab, and know your route to your birth location.
Attending all your prenatal appointments. Consistent care is how your provider monitors you and your baby, catches any issues early, and keeps your pregnancy on track — everything else builds on that foundation.
The Bottom Line
A healthy pregnancy isn’t about doing everything perfectly — it’s about steady, informed steps taken in the right order. Keep your appointments, take your prenatal vitamin, nourish and move your body within your provider’s guidance, and prepare for baby a little at a time. Use this checklist to stay organized and to spark good conversations with your care team, and be gentle with yourself along the way. One trimester at a time, you’ve got a clear path forward.
This article is for general information and is not a substitute for personalized medical advice. Your provider will tailor your care and schedule to your specific pregnancy.
References
- American College of Obstetricians and Gynecologists (ACOG). Routine Tests During Pregnancy.
- March of Dimes. Prenatal care checkups.
- Mayo Clinic. Prenatal care: 1st trimester visits.
