An OB appointment is a prenatal checkup with an obstetrician or midwife to monitor your health and your baby’s development during pregnancy. Most people will have somewhere between 12 and 15 of these visits over the course of a pregnancy, starting as early as six weeks and continuing through delivery and beyond. The visits start simple and become more frequent as your due date approaches.
What Happens at the First Visit
Your first OB appointment is the longest and most involved. It typically happens between 6 and 10 weeks of pregnancy, and you should schedule it as soon as you think you’re pregnant. Plan for it to take longer than a regular doctor’s visit because it covers a lot of ground.
Your provider will ask detailed questions about your menstrual cycle, past pregnancies, personal and family medical history, and any medications or supplements you take. They’ll also ask about lifestyle factors like tobacco, alcohol, caffeine, and recreational drug use. If you’ve traveled to areas where infections like Zika or malaria are common, that’s relevant too. These questions help your provider assess any risks early.
The physical exam includes measuring your weight and height, calculating your BMI, and possibly a breast exam, pelvic exam, and Pap test (if you’re due for one). Some providers will also check your heart, lungs, and thyroid depending on your health history.
Blood work is a major part of this visit. Expect tests that check your blood type and Rh status, measure your hemoglobin (to screen for anemia), confirm immunity to rubella and chickenpox, and screen for infections including hepatitis B, syphilis, gonorrhea, chlamydia, and HIV. You’ll also give a urine sample to check for bladder or urinary tract infections. Your provider will likely offer early genetic screening tests as well, which may include blood work or an ultrasound to check for conditions like Down syndrome. This is also the visit where your due date gets calculated.
How Often You’ll Go
The standard schedule has been essentially the same since 1930: visits every four weeks until 28 weeks, every two weeks from 28 to 36 weeks, then weekly until delivery. In practice, that looks something like this:
- Weeks 6 through 28: One visit every four weeks
- Weeks 28 through 36: One visit every two weeks
- Weeks 36 through delivery: One visit every week
Some providers now incorporate telemedicine for certain check-ins, and ACOG’s 2025 guidance encourages a more tailored approach to scheduling. But for uncomplicated pregnancies, the traditional schedule remains the baseline.
What Happens at Every Routine Visit
After that thorough first appointment, most follow-up visits are shorter and more predictable. At each one, your provider will check your blood pressure and weight, listen to your baby’s heart rate, and measure your abdomen to track growth. These three things give a quick snapshot of how both of you are doing. The visits feel routine, but each measurement helps catch potential problems like preeclampsia (signaled by rising blood pressure) or growth concerns early.
Second Trimester Screenings
Two key events happen during the middle stretch of pregnancy. Between 18 and 20 weeks, most providers schedule a detailed anatomy scan, which is the ultrasound where each of your baby’s organs, limbs, and structures gets examined closely. This is often the appointment where parents learn the sex if they want to know.
Between 24 and 28 weeks, you’ll do a glucose screening test for gestational diabetes. This involves drinking a sugary solution and having your blood drawn afterward to see how your body processes the sugar. If you have high glucose levels in your urine at earlier visits or you’re at higher risk for diabetes, your provider may move this test up.
Third Trimester: What Changes
Visits ramp up in frequency during the third trimester because the final weeks matter most for catching complications. Between 29 and 34 weeks, your provider will start discussing childbirth plans, breastfeeding, and postpartum care. Around 35 to 37 weeks, your provider may offer a pelvic exam to check your cervix.
One important screening happens at 36 or 37 weeks: the Group B strep test. Your provider swabs the vagina and rectum to check for a type of bacteria that’s harmless to you but can be dangerous for your baby during delivery. This test happens late in pregnancy because the bacteria come and go naturally in the body, so testing close to delivery gives the most accurate result. Every pregnant person gets screened, even if a cesarean is planned.
After 37 weeks, you’ll see your provider weekly. These visits focus on monitoring your baby’s position, checking your cervix for signs of labor readiness, and watching for any late-developing concerns like high blood pressure.
High-Risk Pregnancies Mean More Visits
If your pregnancy is considered high risk, expect a more intensive schedule with additional monitoring. The most common reasons for a high-risk designation include diabetes, high blood pressure, heart problems, and being over 35. A history of blood clots, a previous complicated pregnancy, or concerns about the baby’s growth or amniotic fluid levels can also increase the frequency of your visits. More women are having high-risk pregnancies than in previous decades, partly because of rising rates of conditions like obesity and partly because more people are having babies later in life.
The Postpartum Visit
OB care doesn’t end at delivery. Your final appointment happens around 12 weeks after birth, though additional check-ins may be scheduled sooner if needed. This visit includes a physical and pelvic exam to make sure you’re healing well.
Your provider will also screen for postpartum depression and anxiety, and ask about practical challenges: sleep, pain, bleeding, urinary issues, breastfeeding difficulties, and whether you have enough support at home with things like childcare, meals, and transportation. Sexual health comes up too, including when it’s safe to resume sex, pain concerns, and birth control options. Before this visit wraps up, your provider should help you transition to routine ongoing care, connecting you with any specialists you might need going forward.