An obstetrician is a doctor who specializes in pregnancy, childbirth, and the weeks of recovery afterward. Their scope covers everything from your first prenatal visit through postpartum checkups, including managing complications, performing surgeries like cesarean sections, and monitoring your baby’s health before and during delivery. Most obstetricians also train in gynecology, which is why you’ll often see them referred to as OB/GYNs, but the obstetrics side of their work focuses specifically on caring for pregnant patients.
Prenatal Care From First Visit to Delivery
One of the biggest parts of an obstetrician’s job happens long before labor begins. Prenatal visits typically start early in the first trimester and occur about every four weeks initially, becoming more frequent as the due date approaches. At that first appointment, your obstetrician will run a series of blood tests to check your blood type, iron levels, immunity to infections like rubella and chickenpox, and screen for hepatitis B, syphilis, HIV, and other infections. A urine sample checks for bladder or urinary tract infections. You’ll also get a physical exam that may include a breast exam, pelvic exam, and Pap test if you’re due for one.
As your pregnancy progresses, your obstetrician tracks fetal development using ultrasound imaging. By about 12 to 14 weeks, a handheld Doppler device can pick up the baby’s heartbeat. Genetic screening tests, which may combine blood work with ultrasound, check for conditions like Down syndrome. In the third trimester, ultrasound shifts toward monitoring fetal growth, especially in higher-risk pregnancies. A biophysical profile, which pairs ultrasound with fetal heart rate monitoring, helps assess the baby’s overall health. Specialized Doppler ultrasound can evaluate blood flow through fetal and placental vessels, and 3D or 4D imaging provides more detailed views when needed.
Managing High-Risk Pregnancies
Not every pregnancy follows a straightforward path, and obstetricians are trained to identify and manage complications. A pregnancy is considered high risk when certain factors are present: being over 35 or under 17, having a history of preterm birth, or carrying preexisting conditions like diabetes, high blood pressure, autoimmune diseases such as lupus, obesity, or uterine fibroids. Conditions that develop during pregnancy, like gestational diabetes or preeclampsia, also raise the risk level.
For these patients, the obstetrician adjusts the care plan. That often means more frequent monitoring, additional ultrasounds, and closer tracking of both the mother’s and baby’s health. When complications go beyond what a general obstetrician handles, they refer to or co-manage with a maternal-fetal medicine (MFM) specialist. These are obstetricians with additional fellowship training in high-risk pregnancy. The relationship between the two depends on how severe the condition is and what resources are available locally. In some cases, the MFM specialist consults on specific issues while the obstetrician continues leading care. In others, the MFM specialist takes over entirely.
What Happens During Labor and Delivery
During labor, the obstetrician’s role is to monitor progress, make decisions about interventions, and ensure safety for both mother and baby. For low-risk patients in spontaneous labor, this can be relatively hands-off. The obstetrician may use intermittent listening with a handheld Doppler rather than continuous electronic monitoring, support position changes for comfort, and encourage the mother to use whichever pushing technique feels most effective.
When complications arise, the obstetrician decides whether to intervene and how. That might mean starting medication to strengthen contractions, switching to continuous electronic fetal monitoring, or performing an assisted delivery using forceps or vacuum. If labor stalls or the baby shows signs of distress, the obstetrician makes the call on whether a cesarean section is necessary. The goal, as outlined by the American College of Obstetricians and Gynecologists, is to tailor interventions to each woman’s clinical needs and preferences rather than applying a one-size-fits-all approach.
Surgical Procedures
Obstetricians are surgeons. The cesarean section is the most well-known obstetric surgery, but their surgical scope extends further. They perform cervical cerclage, a procedure that stitches the cervix closed to prevent preterm delivery in women with cervical insufficiency. They perform amniocentesis, inserting a needle into the amniotic sac to collect fluid for genetic testing. Dilation and curettage is another common procedure, used after a miscarriage or for other diagnostic purposes.
Because most obstetricians are also trained in gynecology, their surgical repertoire includes procedures outside of pregnancy as well: hysterectomies (performed vaginally, abdominally, or laparoscopically), removal of uterine fibroids, tubal ligations, diagnostic and operative laparoscopy, and various office procedures like colposcopy and endometrial biopsy.
Postpartum Care
An obstetrician’s job doesn’t end at delivery. Current guidelines recommend that all women have contact with their obstetrician within the first three weeks after birth, followed by ongoing care as needed and a comprehensive postpartum visit no later than 12 weeks after delivery. In practice, many women in the United States don’t see their provider until the traditional 4 to 6 week checkup, though the trend is moving toward earlier and more frequent contact.
The comprehensive postpartum visit covers a wide range of concerns: physical recovery from birth, mood and emotional well-being (including screening for postpartum depression), infant feeding, sleep and fatigue, contraception and birth spacing, sexual health, and management of any chronic conditions. For women with complications during pregnancy, like gestational diabetes or preeclampsia, the obstetrician coordinates follow-up to monitor for lasting effects on long-term health.
Education and Training
Becoming an obstetrician requires a medical degree (either MD or DO) followed by four years of residency training in obstetrics and gynecology, accredited by the Accreditation Council for Graduate Medical Education. That’s a minimum of 12 years after high school: four years of undergraduate education, four years of medical school, and four years of residency. To become board certified, residents must pass qualifying and certifying exams administered by the American Board of Obstetrics and Gynecology.
During residency, obstetricians train across both obstetric and gynecologic care. This includes a minimum of two months focused on family planning and comprehensive reproductive health care, covering all forms of contraception, surgical sterilization methods, patient counseling, and management of complications. Those who want to subspecialize further, such as in maternal-fetal medicine or reproductive endocrinology, complete an additional two to three years of fellowship training after residency.
Obstetrician vs. Gynecologist
The two titles overlap so often that many people assume they’re the same thing. They aren’t. A physician focused solely on obstetrics cares for patients during preconception, pregnancy, childbirth, and the immediate postpartum period, but does not treat health issues outside of pregnancy. A physician focused solely on gynecology handles cancer screenings, urinary tract issues, hormonal concerns, and other aspects of reproductive health, but does not deliver babies or manage pregnant patients. Most practitioners in the U.S. train in both and practice as OB/GYNs, which is why the distinction rarely matters in everyday life. But if you’re pregnant or planning to become pregnant, it’s the obstetrics training that matters most for your care.