A typical low-risk pregnancy involves 12 to 14 prenatal visits, starting monthly and becoming more frequent as your due date approaches. Every appointment includes a few recurring basics, but specific tests and screenings are clustered at key points. Here’s what happens at each stage so you know what to expect before you walk in.
The Overall Visit Schedule
The standard schedule recommended by the American College of Obstetricians and Gynecologists follows a predictable pattern: monthly visits until 28 weeks, every two weeks from 28 to 36 weeks, and weekly from 36 weeks until delivery. Your provider may adjust this if you have a higher-risk pregnancy or complications that need closer monitoring.
What Happens at Every Visit
Regardless of where you are in pregnancy, a few things are checked each time. Your provider will take your blood pressure, weigh you, and test a urine sample. The urine check looks for signs of infection, protein (which can signal a blood pressure complication called preeclampsia), and sugar. Starting around 20 weeks, your provider also measures fundal height, which is the distance from your pubic bone to the top of your uterus. This number in centimeters should roughly match your week of pregnancy, plus or minus two. So at 28 weeks, a measurement between 26 and 30 centimeters is normal. Fundal height is a quick way to confirm the baby is growing on track without an ultrasound.
At most visits, your provider will also listen to the baby’s heartbeat using a handheld Doppler device. This is usually possible starting around 10 to 12 weeks.
The First Visit (6 to 10 Weeks)
Your first prenatal appointment is the longest one. Expect it to take an hour or more. Your provider will ask detailed questions about your overall health, any chronic conditions, medications or supplements you take, past pregnancies, exercise habits, and whether you smoke, drink, or use drugs. They’ll also ask about genetic conditions or health problems that run in your or your partner’s family.
You’ll have a full pelvic exam, a Pap smear, and cultures to check for infections. Your provider will draw blood for what’s called a prenatal panel: a broad set of tests run early to catch potential problems. This panel includes a complete blood count, your blood type and Rh factor, immunity to rubella, a hepatitis panel covering hepatitis A, B, and C, tests for syphilis and HIV, a cystic fibrosis carrier screen, and a urine analysis and culture. You may also get a dating ultrasound to confirm how far along you are.
This visit sets your baseline. Future appointments are much shorter because the heavy lifting of history-taking and lab work is done here.
First Trimester Screening (10 to 13 Weeks)
Between 10 and 13 weeks, your provider will discuss genetic screening options. One common option is a cell-free DNA blood test, sometimes called NIPT. This test analyzes fragments of the baby’s DNA circulating in your blood and screens for chromosomal conditions like Down syndrome, trisomy 18, and trisomy 13. It can be done any time from 10 weeks through the rest of pregnancy, but most people have it drawn in the first trimester. It also reveals the baby’s sex if you want to know.
Some providers also offer a nuchal translucency ultrasound around 11 to 13 weeks. This measures a small pocket of fluid at the back of the baby’s neck. A larger-than-expected measurement can indicate a higher chance of a chromosomal condition. These screenings are optional, and your provider will walk you through the pros and cons.
Second Trimester Visits (14 to 27 Weeks)
Monthly visits during the second trimester tend to be quick, sometimes just 10 to 15 minutes. Your provider checks your weight, blood pressure, urine, and the baby’s heartbeat. Starting at 20 weeks, fundal height is added to this routine. These appointments are a good time to bring up any symptoms you’re experiencing, like back pain, round ligament pain, or swelling.
The Anatomy Scan (18 to 22 Weeks)
The mid-pregnancy anatomy scan is the most detailed ultrasound of your entire pregnancy and typically happens between 18 and 22 weeks. Plan for the appointment to take 30 to 60 minutes. The sonographer examines the baby from head to toe, checking dozens of specific structures. They look at the brain, face, lips, spine, heart (including its four chambers and the major blood vessels), lungs, stomach, kidneys, bladder, arms, legs, hands, and feet. They also measure the baby’s head, abdomen, and thigh bone to estimate growth.
Beyond the baby, the sonographer evaluates the placenta’s location and appearance, how the umbilical cord is attached, your amniotic fluid levels, and your cervix length. If the placenta is sitting low over the cervix, your provider will likely recheck it later since it often moves up as the uterus grows. This is also typically when you can find out the baby’s sex if you haven’t already learned it through a blood test.
If the sonographer can’t get a clear view of every structure (the baby’s position doesn’t always cooperate), you may be asked to come back for a follow-up scan.
Glucose Screening (24 to 28 Weeks)
Between 24 and 28 weeks, you’ll be screened for gestational diabetes. The most common approach in the United States is a two-step process. The first step is a one-hour glucose challenge test: you drink a sugary solution containing 50 grams of glucose, and your blood is drawn one hour later. You don’t need to fast beforehand, and it can be done at any time of day. A result below 130 or 140 mg/dL (the threshold varies by practice) means you pass and no further testing is needed.
If your number comes back above the cutoff, it doesn’t mean you have gestational diabetes. It means you’ll need the second step: a longer, three-hour test using a 100-gram glucose drink. For that one, you do need to fast overnight, and your blood is drawn at fasting, one hour, two hours, and three hours. Two or more elevated readings on this test confirm a gestational diabetes diagnosis.
Early Third Trimester (28 to 35 Weeks)
Visits pick up to every two weeks starting at 28 weeks. If your blood type is Rh-negative, you’ll receive an injection around this time to prevent your body from producing antibodies that could affect the baby’s blood cells. Your provider continues tracking weight gain, blood pressure, fundal height, and the baby’s heart rate.
The CDC recommends getting the Tdap vaccine (which protects against whooping cough) between 27 and 36 weeks, preferably on the earlier side of that window. Getting vaccinated during this period allows your body to produce antibodies that cross the placenta and protect the baby during their first few months of life, before they’re old enough for their own vaccination series.
Around this time, your provider may also start discussing your birth preferences and checking the baby’s position. They’ll feel your abdomen to determine whether the baby is head-down, breech, or sideways.
Weeks 36 to 37: Group B Strep Test
During your 36th or 37th week, your provider screens for Group B Streptococcus, a type of bacteria that about 25% of healthy women carry. The test is simple: a swab of the vagina and rectum, sent to a lab. It doesn’t hurt. If you test positive, you’ll receive antibiotics through an IV during labor to reduce the chance of passing the bacteria to the baby during delivery. A positive result doesn’t mean anything is wrong with you; it just changes how labor is managed.
Weekly Visits Until Delivery (36 to 40+ Weeks)
Once you hit 36 weeks, you’ll see your provider every week. These visits check blood pressure and weight, listen to the heartbeat, feel the baby’s position, and give you a chance to ask questions as delivery approaches. Around 38 weeks, your provider may begin offering cervical exams to check whether your cervix has started to dilate (open) or efface (thin). These exams are optional, and some providers don’t do them routinely unless you’re being evaluated for induction or showing signs of labor.
Keep in mind that dilation at this stage doesn’t predict when labor will start. Some people walk around dilated for weeks, while others go from zero to active labor quickly. Your provider is looking at the overall picture, not just one number.
If your pregnancy goes past 40 weeks, your provider will likely recommend fetal monitoring, which can include a non-stress test to track the baby’s heart rate patterns or an ultrasound to check amniotic fluid levels. These help confirm the baby is still doing well while you wait for labor to begin.