A standard prenatal care schedule runs monthly visits through week 28, biweekly visits from weeks 28 to 36, and weekly visits from week 36 until delivery. The timing of each appointment is not arbitrary. It maps to the milestones where your provider needs to assess growth, order specific screenings, and catch any changes before they develop into complications. Knowing what to expect at each stage makes it easier to show up prepared and to ask the right questions.
What Happens at Your First Prenatal Appointment?
The first prenatal visit is the longest appointment in your entire pregnancy. It typically takes place between weeks 8 and 10, once a fetal heartbeat can be confirmed, and is more comprehensive than any appointment that follows.
Your provider will review your full medical and gynecological history, confirm the pregnancy, and calculate your estimated due date based on your last menstrual period and early ultrasound measurements. A physical exam is performed, which includes a pelvic exam, blood pressure reading, weight measurement, and a review of any current medications or supplements.
Baseline lab work ordered at this visit covers a wide range: blood type and Rh factor, a complete blood count to check for anemia, rubella immunity, hepatitis B and C, HIV status, syphilis and thyroid function in some cases. A urine culture screens for bacteria that can cause complications if left untreated. If you are not up to date on your Pap smear, cervical screening is typically completed at this visit as well.
This appointment is also the right time to bring any questions you have, including questions about symptoms, nutrition, exercise, or what the coming months will look like. Your provider will walk through what the upcoming visit schedule involves and flag any factors in your history that may warrant closer monitoring throughout the pregnancy.
First Trimester Visits: Weeks 4 to 13
After the initial appointment, most patients return once a month through the end of the first trimester. These visits are shorter and focus on tracking blood pressure, weight and any symptoms you are experiencing.
Genetic Screening Options (Weeks 10 to 13)
Between weeks 10 and 13, your provider may offer first-trimester genetic screening. This includes the nuchal translucency ultrasound, which measures fluid at the back of the baby’s neck and, when combined with blood markers, can assess the likelihood of chromosomal conditions such as Down syndrome and trisomy 18. Non-invasive prenatal testing, or NIPT, is a blood draw that analyzes cell-free fetal DNA in the maternal bloodstream and can screen for the same conditions with a high degree of accuracy.
Both the nuchal translucency screening and NIPT are screening tools, not diagnostic tests. A positive screen means the risk is elevated, not that a condition is confirmed. Your provider will explain what any results mean and what follow-up steps are available. For more on what genetic screening during pregnancy involves, read our post on why prenatal genetic testing might be right for you.
Second Trimester Visits: Weeks 14 to 27
Second trimester visits follow the same monthly schedule. Appointments continue to track blood pressure, weight, fundal height (the measurement from your pubic bone to the top of the uterus) and fetal heart tones.
The Anatomy Scan (Around Week 20)
The anatomy scan, typically performed between weeks 18 and 22, is the most detailed ultrasound in a standard pregnancy. It examines the baby’s brain, spine, heart, kidneys, limbs and abdominal organs to confirm structural development is on track. It also evaluates placenta placement, amniotic fluid levels, and cervical length. Most patients learn the baby’s sex at this appointment if they choose to. The scan is performed in-office and typically takes 30 to 60 minutes depending on fetal positioning.
If the anatomy scan identifies findings that need a closer look, a follow-up ultrasound or referral to maternal-fetal medicine may be arranged. A normal scan does not guarantee a normal outcome, but it provides a thorough structural picture of the pregnancy at its midpoint.
Glucose Screening (Weeks 24 to 28)
Gestational diabetes screening takes place between weeks 24 and 28. The standard one-hour glucose challenge test involves drinking a 50-gram glucose solution, waiting one hour, then having your blood drawn to measure blood sugar levels. No fasting is required for this version of the test.
If your result exceeds the threshold, a three-hour glucose tolerance test is ordered as follow-up. That test requires fasting and multiple blood draws over the course of several hours. A gestational diabetes diagnosis does not mean the pregnancy is automatically high-risk, but it does require additional monitoring and dietary management. Read more about managing gestational diabetes and what the diagnosis means for your pregnancy.
How Do Prenatal Visits Change in the Third Trimester?
At 28 weeks, the visit schedule increases to every two weeks. At 36 weeks, it moves to weekly. The increased frequency exists because the final weeks of pregnancy are when blood pressure complications, fetal growth restriction and early labor signs are most likely to surface.
Weeks 28 to 35
Each appointment in this range measures the same core markers: blood pressure, weight, fundal height and fetal heart rate. Fetal movement is discussed at each visit, and most providers recommend tracking kick counts as a simple way to monitor fetal activity at home between appointments.
At around 28 weeks, a repeat blood draw is ordered for patients with Rh-negative blood type. An Rh immunoglobulin injection, commonly called Rhogam, is administered to prevent the development of antibodies that could affect the baby. A repeat complete blood count also checks for anemia, which is common in the third trimester as blood volume expands.
Weeks 35 to 37
Between weeks 35 and 37, your provider will perform a Group B Streptococcus (GBS) swab. Group B Strep is a common bacterial strain that, while typically harmless to adults, can be passed to the baby during vaginal delivery and cause serious infection in newborns. The swab takes just a few seconds and requires no preparation. Patients who test positive receive IV antibiotics during labor.
The Tdap vaccine is also recommended during this period, ideally between weeks 27 and 36. The Tdap protects against tetanus, diphtheria and pertussis (whooping cough). Because newborns cannot receive the pertussis vaccine until two months of age, vaccination during pregnancy allows antibodies to pass to the baby before birth.
Weeks 36 to 40+
Weekly visits from 36 weeks onward focus on fetal positioning, cervical dilation and effacement, and any early signs of labor. Your provider will confirm the baby has moved into a head-down position. If the baby remains in a breech position approaching 37 weeks, your provider may discuss an external cephalic version, or ECV, a procedure that manually guides the baby into position from outside the abdomen.
Cervical checks typically begin at this stage, though dilation and effacement numbers are not predictive of exactly when labor will begin. Blood pressure monitoring becomes especially important in these final weeks, as preeclampsia can develop late in pregnancy and requires prompt assessment.
If you reach 40 weeks without spontaneous labor, your provider will discuss options including a membrane sweep or induction depending on your cervical readiness and the baby’s status on monitoring.
What Screenings and Tests Are Done During Prenatal Visits?
Each trimester introduces specific lab work and screenings timed to the stage of fetal development. The table below outlines when standard tests are typically performed.
| Test | Timing | Purpose |
| Blood type and Rh factor | First visit | Establish blood compatibility |
| Complete blood count | First visit, repeat at 28 weeks | Screen for anemia |
| Rubella immunity | First visit | Confirm immunity status |
| Hepatitis B and C | First visit | Screen for infection |
| HIV | First visit | Standard screening |
| Urine culture | First visit, ongoing | Detect asymptomatic bacteria |
| NIPT or nuchal translucency | Weeks 10–13 | Chromosomal screening |
| Anatomy scan | Weeks 18–22 | Structural fetal assessment |
| Glucose challenge test | Weeks 24–28 | Screen for gestational diabetes |
| Rhogam injection | 28 weeks (Rh-negative patients) | Prevent antibody development |
| Group B Strep swab | Weeks 35–37 | Determine labor antibiotic need |
| Tdap vaccine | Weeks 27–36 | Protect newborn from pertussis |
Patients with certain risk factors or conditions may need additional monitoring throughout. High-risk pregnancy care follows the same foundational schedule but adds supplemental ultrasounds, biophysical profiles, and non-stress testing at intervals your provider determines based on your specific situation.
Schedule Prenatal Care at Roswell Ob/Gyn, LLC
The earlier prenatal care begins, the more your provider can establish a baseline and catch any changes as they develop. Roswell Ob/Gyn, LLC provides routine and high-risk prenatal care across locations in Alpharetta, Atlanta, Canton and Cumming, Georgia, with in-office ultrasound, genetic screening options and the full range of monitoring needed at each stage of pregnancy. If you are newly pregnant or planning to be, contact us to schedule your first prenatal appointment.
Frequently Asked Questions
How many prenatal visits are typical for a low-risk pregnancy?
A low-risk pregnancy typically involves 10 to 15 prenatal visits from the first appointment through delivery. The first visit is the longest, followed by monthly checkups through 28 weeks, biweekly visits from 28 to 36 weeks, and weekly visits from 36 weeks until the baby arrives.
What should I bring to my first prenatal appointment?
Bring your insurance card, a list of any current medications and supplements, the date of your last menstrual period, and any relevant medical history such as past pregnancies, surgeries, or chronic conditions. If you have records from a previous provider, bring those as well. Wearing comfortable clothing makes the physical exam easier.
Can I skip prenatal visits if I feel fine?
Attendance at every scheduled visit matters regardless of how well you feel. Many of the conditions that develop during pregnancy, including high blood pressure, gestational diabetes, and changes in fetal growth, do not produce noticeable symptoms in early stages. Routine monitoring is how your provider catches these changes before they become complications.
What happens if I miss a visit?
Contact your provider’s office to reschedule as soon as possible. Missed visits are most significant when they fall during key screening windows, such as the glucose challenge test at weeks 24 to 28 or the Group B Strep swab at weeks 35 to 37. Your provider can advise on how to get back on track based on where you are in the pregnancy.
Are prenatal visits different for high-risk pregnancies?
The core visit schedule is the same, but high-risk pregnancies typically include additional monitoring. This may involve more frequent ultrasounds, non-stress tests, biophysical profile assessments, and closer blood pressure tracking. Your provider will outline a modified schedule based on your specific risk factors.
When should I start childbirth education classes?
Most childbirth education programs recommend enrolling in the second or early third trimester, ideally completing the course before 36 weeks. Finishing the course before 36 weeks means you have time to prepare before labor begins. Roswell Ob/Gyn, LLC offers one-day childbirth classes designed to prepare expectant parents for labor, delivery and the immediate postpartum period.
