A high risk pregnancy is one in which the pregnant person, the fetus, or both face a greater than average chance of complications before, during, or after birth. Understanding what makes a pregnancy high risk matters because early identification changes how care is planned, how often patients are seen, and which specialists are involved. Not every high-risk pregnancy ends in complications, and many result in healthy births. The label is best understood as a signal to add monitoring and coordination, not a prediction of a poor outcome.
This guide explains what a high risk pregnancy is, the conditions and factors that contribute to it, and how modern high-risk pregnancy care is structured across a patient's obstetric team.
What is a high risk pregnancy?
There is no single test that classifies a pregnancy as high risk. Instead, clinicians weigh a combination of medical history, current health conditions, pregnancy-specific findings, and demographic factors. When one or more of these raise the probability of complications, the pregnancy is designated high risk and the care plan is adjusted accordingly.
The designation can be present from the first prenatal visit, as with a patient who has pre-existing diabetes or chronic hypertension, or it can emerge later, as when preeclampsia or a growth restriction develops in the second or third trimester. Because risk is dynamic, a pregnancy that begins as low risk can become high risk, and appropriate monitoring is what allows the team to catch that shift.
A key part of high-risk care is the maternal-fetal medicine (MFM) specialist, an obstetrician with additional subspecialty training in complicated pregnancies. Many patients continue to see their regular OB-GYN or midwife while adding MFM input for specific concerns, a co-management model that keeps routine care local while bringing specialized expertise to the higher-risk elements.
What makes a pregnancy high risk?
The factors that make a pregnancy high risk generally fall into a few broad categories. Most patients who carry a high-risk designation do so because of one or two factors, not a long list.
Maternal age. Both younger and older ends of the reproductive age range carry added considerations. Pregnancy at 35 and older is associated with higher rates of chromosomal conditions, gestational diabetes, and hypertensive disorders. You can read more in our overview of high-risk pregnancy age.
Pre-existing medical conditions. Chronic health conditions that predate pregnancy are among the most common reasons for a high-risk designation. These include chronic hypertension, type 1 or type 2 diabetes, autoimmune conditions such as lupus, thyroid disease, kidney disease, and certain cardiac conditions.
Pregnancy-related complications. Some conditions arise during pregnancy itself. These include gestational diabetes, preeclampsia and other hypertensive disorders of pregnancy, placenta previa, placental abruption, and fetal growth restriction.
Multiple gestation. Carrying twins, triplets, or more increases the likelihood of preterm birth, growth restriction, and hypertensive disorders, and typically prompts closer surveillance.
Obstetric history. A prior preterm birth, prior pregnancy loss, prior cesarean, or a history of preeclampsia raises the probability of recurrence and shapes the current care plan.
Lifestyle and social factors. Tobacco, alcohol, and certain substance use, along with barriers to consistent prenatal care, can elevate risk and are addressed as part of a comprehensive plan.
What are common high-risk pregnancy conditions?
Several conditions account for a large share of high-risk pregnancies. Being familiar with them helps patients and referring clinicians understand what monitoring is designed to detect.
Gestational diabetes is elevated blood sugar that develops during pregnancy. It is typically screened for between 24 and 28 weeks and is managed with nutrition, glucose monitoring, and sometimes medication. Well-controlled gestational diabetes substantially reduces associated risks to the pregnancy.
Preeclampsia is a hypertensive disorder marked by high blood pressure and signs of organ stress, often after 20 weeks. According to ACOG, hypertensive disorders of pregnancy affect a meaningful share of pregnancies in the United States and are a leading contributor to maternal morbidity, which is why blood pressure surveillance is central to high-risk care.
Preterm birth, defined as delivery before 37 weeks, is a major focus of maternal-fetal medicine. The CDC reports that roughly one in ten US births is preterm. Identifying patients at elevated risk allows for interventions that can lengthen pregnancy or prepare for earlier delivery.
Fetal growth restriction occurs when a fetus is not growing at the expected rate and is followed with serial ultrasounds and other testing.
Placental conditions such as placenta previa, where the placenta covers the cervix, and placental abruption, where it separates prematurely, require careful planning around delivery.
How does high-risk pregnancy care work?
High-risk pregnancy care is built around three principles: earlier identification, closer monitoring, and tighter coordination among the patient's clinicians.
In practice, this often means more frequent prenatal visits, additional ultrasounds, and specific testing such as nonstress tests or biophysical profiles in the third trimester. Blood pressure and blood glucose are followed more closely when relevant, and medication regimens are reviewed to confirm they are appropriate for pregnancy.
Coordination is what distinguishes strong high-risk care. A patient with chronic hypertension and gestational diabetes may be receiving input from an OB-GYN, an MFM specialist, and a primary care or endocrinology clinician at the same time. Keeping those recommendations aligned prevents gaps and conflicting guidance.
Telehealth has expanded access to specialized input, particularly for patients in areas without a local MFM practice. Remote patient monitoring can support the collection of blood pressure and glucose readings between visits, giving the care team more data points to work with. This is a complement to in-person obstetric care, not a replacement for it, and it does not constitute continuous real-time surveillance.
Choosing the right specialist matters, and patients often ask how to evaluate their options. Our guide to finding a high-risk pregnancy doctor walks through what to look for.
What can patients expect during a high-risk pregnancy?
The day-to-day experience varies with the specific risk factors, but several themes are common. Patients can generally expect more touchpoints with their care team, clearer instructions about warning signs to watch for, and a delivery plan tailored to their situation, including where and when delivery is anticipated.
It is worth repeating that a high-risk designation is not a diagnosis of a bad outcome. For many patients, added monitoring provides reassurance and catches issues early enough to address them. The goal of high-risk pregnancy care is to make the pregnancy as safe as possible for both the patient and the baby.
Patients should feel empowered to ask their team why they carry a high-risk designation, what it means for their specific plan, and what symptoms warrant an immediate call. Clear communication is one of the strongest tools in managing a complicated pregnancy.
Ouma Health is a physician-led, MFM-founded maternity telehealth practice that partners with health plans, employers, and provider organizations to extend specialized maternity care, including support for high-risk pregnancies. As a real medical practice rather than an app, Ouma's clinicians provide co-management alongside a patient's existing team. Learn more about our high-risk pregnancy services.
Frequently asked questions
What makes a pregnancy high risk?
A pregnancy is considered high risk when medical history, current health conditions, pregnancy-specific findings, or factors like maternal age and multiple gestation raise the chance of complications for the patient, the fetus, or both. It is a signal to add monitoring and coordination, not a prediction of a poor outcome.
Does a high-risk pregnancy mean something will go wrong?
No. Many high-risk pregnancies result in healthy births. The designation prompts closer monitoring so that any issues can be identified and managed early, which is why many patients experience it as reassurance rather than alarm.
Do I need a maternal-fetal medicine specialist for a high-risk pregnancy?
Often, yes, though not always exclusively. Many patients continue with their OB-GYN or midwife while adding MFM input for specific concerns in a co-management model that keeps routine care local while bringing in specialized expertise.
Can a low-risk pregnancy become high risk?
Yes. Risk is dynamic, and conditions such as gestational diabetes, preeclampsia, or fetal growth restriction can develop during pregnancy. Regular prenatal care is what allows the team to detect that shift and adjust the care plan.
