High-risk pregnancy: causes, symptoms, risks, precautions and how to stay safe

A pregnancy is a major physical and emotional journey, and while most pregnancies progress normally, some need closer monitoring because the mother, baby or both have a higher-than-average chance of developing complications. This is known as a high-risk pregnancy.

Being told that your pregnancy is high risk can understandably feel frightening. However, high risk does not automatically mean that something will go wrong. Many women with high-risk pregnancies go on to have healthy pregnancies and deliver healthy babies. The term mainly tells your healthcare team that you may need additional monitoring, investigations or specialist care.

The reasons for a pregnancy being classified as high risk can vary considerably. They may include diabetes, high blood pressure, obesity, autoimmune disease, multiple pregnancy, placenta-related problems, a previous preterm birth, certain fetal conditions or maternal age.

Early and regular antenatal care is one of the most important ways to identify these risks and manage them appropriately.

What does it mean if you are a high-risk pregnancy?

A high-risk pregnancy is one in which there is a greater-than-average possibility of complications affecting the pregnant woman, the baby or both.

A pregnancy may be considered high risk before conception, at the beginning of pregnancy or later during pregnancy. For example, a woman with diabetes or chronic hypertension may already have risk factors before becoming pregnant. Another woman may initially have an uncomplicated pregnancy but later develop gestational diabetes, preeclampsia, placenta previa or fetal growth restriction.

High-risk pregnancy care may involve:

• More frequent antenatal appointments
• Additional blood and urine tests
• More frequent ultrasound examinations
• Monitoring blood pressure and blood sugar
• Monitoring fetal growth and wellbeing
• Specialist consultations when necessary
• Fetal heart-rate monitoring or other fetal assessments
• Planning the timing and mode of delivery according to the mother’s and baby’s condition

The exact plan depends on why the pregnancy is considered high risk.

What kind of pregnancy is high risk?

There isn’t one single type of pregnancy that is classified as high risk. Several maternal, fetal and pregnancy-related factors can increase risk.

Common examples include:

Multiple pregnancy

Carrying twins, triplets or more increases the likelihood of complications such as preterm birth, pregnancy-induced hypertension and fetal growth problems.

Diabetes

Diabetes that existed before pregnancy and gestational diabetes can require careful monitoring. Poorly controlled blood sugar can increase the risk of complications affecting both mother and baby.

High blood pressure

Chronic hypertension and pregnancy-related hypertension can increase the risk of preeclampsia, placental complications, fetal growth problems and preterm birth.

Previous pregnancy complications

A history of preterm birth, preeclampsia, pregnancy loss, fetal growth restriction or other significant pregnancy complications may influence how closely a subsequent pregnancy is monitored.

Placental problems

Conditions such as placenta previa or placental abruption can require specialised management.

Autoimmune or other medical conditions

Kidney disease, thyroid disorders, heart disease, autoimmune conditions and certain blood-clotting disorders may increase pregnancy risks.

Maternal obesity

Obesity can increase the likelihood of gestational diabetes, hypertension, preeclampsia, cesarean delivery and other complications.

Fetal concerns

A pregnancy may also become high risk when there are concerns about fetal growth, congenital abnormalities, abnormal amniotic fluid levels or other findings on prenatal screening or ultrasound.

Why is my pregnancy high risk?

If your doctor has described your pregnancy as high risk, the most important question is what specific factor is responsible.

For one woman, it may be age. For another, it may be diabetes, hypertension or obesity. For another, it could be twins, a previous preterm birth, placenta previa or an abnormal ultrasound finding.

Sometimes more than one risk factor is present.

Ask your obstetrician:

• What specifically makes my pregnancy high risk?
• What complications am I at increased risk for?
• Which tests or scans do I need?
• How frequently should I have appointments?
• Are there activities I need to modify?
• What symptoms should make me seek urgent medical attention?
• Could my delivery need to happen earlier than expected?

Understanding your individual risk profile is much more useful than simply focusing on the label “high risk.”

Is 35 really high risk for pregnancy?

Age 35 is commonly used as a clinical threshold for discussing increased pregnancy risks, but turning 35 does not automatically make a pregnancy dangerous.

The American College of Obstetricians and Gynecologists (ACOG) recognises pregnancy with anticipated delivery at age 35 or older as a risk factor for adverse maternal, fetal and neonatal outcomes. At the same time, ACOG notes that 35 is an historical threshold and that some age-related risks become more pronounced at 40 and above.

Age is only one part of the overall picture. A healthy 36-year-old with no significant medical conditions may have a very different risk profile from a 36-year-old with diabetes, hypertension or another medical condition.

Therefore, 35 should not be treated as a magic number separating “safe” and “unsafe” pregnancies.

Your doctor will consider age together with your medical history, pregnancy history, current health and findings during pregnancy.

At what age is pregnancy considered high risk?

Pregnancy at 35 years or older is often described as advanced maternal age and is considered a risk factor that may require more individualised assessment. Pregnancy during the teenage years can also carry increased risks.

Importantly, age alone does not determine whether a pregnancy will have complications. Cleveland Clinic also notes that age is not by itself sufficient to determine high-risk status.

Some risks increase progressively with age rather than suddenly at 35. ACOG notes that certain complications become more relevant at age 40 and above.

What is the riskiest age to get pregnant?

There is no single age that can accurately be called the “riskiest” for every woman.

Pregnancy during adolescence can be associated with certain complications, while pregnancy at older ages is associated with increasing risks of conditions such as preeclampsia, gestational diabetes, miscarriage and stillbirth.

Among older pregnant women, some risks become more pronounced after 40. However, the overall risk depends on the individual’s health, reproductive history and pregnancy circumstances rather than age alone.

Do high-risk pregnancies deliver early?

Not necessarily.

A high-risk pregnancy does not automatically mean that the baby will be born prematurely. Many high-risk pregnancies continue to term.

However, some conditions associated with high-risk pregnancy can increase the likelihood of preterm birth. These include multiple pregnancy, previous preterm birth, certain placental problems, infections, cervical problems and some maternal medical conditions.

Sometimes doctors may recommend an early delivery because continuing the pregnancy becomes riskier for the mother or baby. This can happen with severe preeclampsia, significant fetal growth restriction, placental problems or other serious complications.

The decision depends on the specific medical situation, gestational age and wellbeing of both mother and baby.

Which weeks of pregnancy are the most high risk?

There isn’t one universally “most dangerous” week of pregnancy. Different complications are more likely at different stages.

First trimester: 0–13 weeks

The first trimester is particularly important because early pregnancy loss and certain developmental problems are more likely during this period.

Early antenatal care helps establish gestational age, identify multiple pregnancy and detect some potential problems.

Second trimester: 14–27 weeks

This period includes important screening and anatomical assessment. Conditions such as gestational diabetes are generally screened for around 24–28 weeks, while concerns about cervical length, fetal growth or structural abnormalities may emerge during this period.

Third trimester: 28 weeks onwards

Monitoring becomes increasingly focused on maternal blood pressure, fetal growth, fetal movements, placental function and preparation for delivery.

Preeclampsia typically develops after 20 weeks, while fetal growth restriction and preterm birth can become important concerns later in pregnancy.

So rather than asking which week is the most dangerous, it is more useful to understand that different stages carry different risks.

What are the symptoms of high-risk pregnancy?

There isn’t a specific set of symptoms that defines a high-risk pregnancy. In fact, some women have no symptoms at all and are considered high risk because of their medical history or pregnancy findings.

However, symptoms that need prompt medical assessment include:

• Vaginal bleeding
• Fluid leaking from the vagina
• Severe or persistent abdominal pain
• Severe headache that does not improve
• Changes in vision
• Significant swelling of the face or hands
• Difficulty breathing
• Chest pain or a racing heartbeat
• Severe vomiting
• Dizziness or fainting
• A significant reduction or stopping of fetal movements
• Fever
• Severe swelling, redness or pain in one leg

These warning signs can occur in both high-risk and otherwise uncomplicated pregnancies and should not be ignored.

What are 6 danger signs in pregnancy?

Six particularly important warning signs are:

1. Vaginal bleeding or leaking fluid
2. Severe abdominal or pelvic pain
3. Severe headache, especially with vision changes
4. Difficulty breathing or chest pain
5. Baby’s movements becoming significantly reduced or stopping
6. Sudden severe swelling of the face or hands

These are not the only warning signs. Fever, fainting, severe vomiting, significant leg swelling or pain and other sudden symptoms can also require urgent evaluation.

If any concerning symptom is severe, sudden or feels unusual, contact your healthcare provider or seek emergency medical care rather than waiting for your next appointment.

How to reduce high-risk pregnancy?

You cannot prevent every high-risk pregnancy. Some risk factors, such as age, previous pregnancy history or certain medical conditions, cannot simply be removed.

However, you can reduce the likelihood or severity of some complications by:

Start antenatal care early

Regular prenatal care helps doctors identify problems before they become serious. WHO recommends structured antenatal care that includes maternal and fetal assessment, nutritional counselling, appropriate testing and ultrasound when indicated.

Control existing medical conditions

If you have diabetes, high blood pressure, thyroid disease, kidney disease or another chronic condition, work with your healthcare team to keep it appropriately controlled.

Take prescribed supplements

Iron and folic acid are particularly important during pregnancy. WHO recommends daily iron and folic acid supplementation during pregnancy, with folic acid ideally started before conception.

Avoid smoking, alcohol and recreational drugs

These can increase pregnancy risks and should be avoided during pregnancy.

Attend recommended scans and tests

Your doctor may recommend additional ultrasound examinations, blood tests, fetal monitoring or other investigations depending on your risk factors.

Sparsh Diagnostic Centre provides pregnancy-related ultrasonography, including specialised pregnancy scans, NT scans, anomaly scans and Doppler studies.

You can naturally link this section to the [pregnancy ultrasonography tests page]. Pregnancy ultrasonography tests at Sparsh Diagnostic Centre

What should I avoid doing if I have a high-risk pregnancy?

The answer depends on why your pregnancy is high risk. There is no universal list of activities that every high-risk pregnant woman must avoid.

In general, avoid:

• Alcohol and recreational drugs
• Smoking and tobacco exposure
• Taking medicines or supplements without checking with your doctor
• Missing antenatal appointments
• Ignoring warning symptoms
• Extreme physical exertion if your doctor has advised activity restriction
• Crash diets or intentional weight-loss programmes
• Unpasteurised or unsafe foods
• Activities specifically restricted by your obstetrician

Importantly, do not put yourself on complete bed rest simply because your pregnancy is high risk unless your doctor has specifically recommended it. Activity recommendations should be individualised.

Can stress cause high-risk pregnancy?

Stress by itself does not automatically make a pregnancy “high risk.”

However, significant psychological distress during pregnancy has been associated in research with adverse outcomes, including an increased likelihood of preterm birth in some studies. The relationship is complex and can involve multiple factors.

Everyday worries, occasional anxiety or having a stressful day do not mean you have harmed your baby.

If you are experiencing persistent anxiety, depression, overwhelming stress or difficulty coping, speak with your obstetrician or a qualified mental-health professional. Looking after your mental health is an important part of pregnancy care.

What to eat for high-risk pregnancy?

There is no special “high-risk pregnancy diet” that works for everyone. Nutrition should be tailored to your health conditions, nutritional status and pregnancy needs.

In general, aim for a varied diet containing:

• Vegetables, especially leafy green vegetables
• Fresh fruits
• Whole grains
• Pulses, beans and lentils
• Nuts and seeds
• Milk and other safe dairy products
• Adequate protein
• Healthy sources of fats
• Sufficient fluids

WHO recommends a varied diet containing adequate energy, protein, vitamins and minerals during pregnancy.

If you have gestational diabetes, the dietary approach will be different from that of someone who is underweight or anaemic. Similarly, women with hypertension may receive specific dietary advice.

Do not start supplements such as iron, calcium, vitamin D or other products in large doses without discussing them with your doctor.

For women requiring pregnancy-related blood tests, Sparsh’s offers the entire range of haematology, biochemistry, immunology and other laboratory investigations.

What tests and scans may be needed in a high-risk pregnancy?

The tests depend on the risk factor and stage of pregnancy.

Your doctor may recommend:

• Blood pressure monitoring
• Blood and urine tests
• Blood sugar testing
• Genetic screening when appropriate
• NT scan
• Detailed anomaly scan
• Growth scans
• Doppler studies
• Fetal heart monitoring
• Biophysical profile
• Non-stress testing
• Fetal echocardiography in selected pregnancies

Not every woman needs every test.

For example, a doctor may recommend fetal echocardiography when there are specific risk factors or concerns about the baby’s heart. Sparsh provides fetal echocardiography as part of its prenatal imaging services.

Can a high-risk pregnancy still result in a healthy baby?

Absolutely.

The term “high risk” describes an increased possibility of complications, not a prediction that complications will definitely occur.

Many women with diabetes, hypertension, advanced maternal age, twins or other risk factors have healthy pregnancies and healthy babies with appropriate medical supervision. Cleveland Clinic specifically notes that many people with high-risk pregnancies do not experience problems and deliver healthy babies.

The goal of high-risk pregnancy care is therefore not to create fear. It is to identify potential problems early, monitor them carefully and intervene when necessary.

When should you contact your doctor?

Do not wait for your next routine appointment if you develop a significant or unusual symptom.

Seek urgent medical attention for symptoms such as:

• Heavy vaginal bleeding
• Fluid leaking from the vagina
• Severe abdominal pain
• Severe headache or visual disturbance
• Difficulty breathing
• Chest pain
• Fainting
• Severe vomiting or inability to keep fluids down
• Markedly reduced fetal movement
• Sudden severe swelling
• High fever
• Severe one-sided leg swelling or pain

The CDC recommends immediate medical attention for urgent maternal warning signs such as these.

Frequently asked questions about high-risk pregnancy

Is every pregnancy after 35 high risk?

No. Age 35 or older is considered a risk factor, but age alone does not determine the overall risk of pregnancy. Your doctor will consider your health, medical history, previous pregnancies and current pregnancy findings.

Is 40 a high-risk age for pregnancy?

Pregnancy at 40 or above carries increased risks for several complications compared with younger age groups. However, many women have healthy pregnancies in their 40s with appropriate antenatal care. ACOG recommends individualised assessment based on age and other risk factors.

Does high-risk pregnancy mean I will need a C-section?

No. A high-risk pregnancy does not automatically require a cesarean delivery. The mode of delivery depends on the specific maternal and fetal circumstances.

Will I need more ultrasounds if my pregnancy is high risk?

Possibly. High-risk pregnancies often require additional ultrasound examinations to monitor fetal growth, anatomy, placental conditions or other concerns. The number and timing depend on the reason for increased risk.

Can I work during a high-risk pregnancy?

Many women can continue working during pregnancy, including some women with high-risk pregnancies. However, recommendations may change depending on your medical condition, occupation, symptoms and pregnancy complications. Discuss your work and physical activity with your obstetrician.

Can stress alone make my pregnancy high risk?

Stress alone does not automatically classify a pregnancy as high risk. However, persistent or severe psychological distress has been associated with some adverse pregnancy outcomes, including preterm birth in observational research.

What is the most important thing to do in a high-risk pregnancy?

The most important steps are to follow your antenatal care plan, attend recommended appointments and investigations, take prescribed medicines and supplements, manage existing health conditions and report warning symptoms promptly.

Is ultrasound safe during pregnancy?

Ultrasound uses sound waves rather than ionising radiation and is widely used during pregnancy when medically indicated. Sparsh offers specialised pregnancy ultrasound services including anomaly scans, NT scans and Doppler studies.

Final thoughts

A high-risk pregnancy deserves closer attention, not unnecessary fear.

Risk can arise from many different factors, including diabetes, high blood pressure, obesity, multiple pregnancy, placenta-related conditions, previous pregnancy complications, certain medical conditions and maternal age. Some pregnancies begin as high risk, while others become high risk as pregnancy progresses.

There is also no single “riskiest week” or age that applies to every woman. Pregnancy risks change throughout the three trimesters, which is why regular antenatal care matters.

If your pregnancy has been classified as high risk, ask your doctor exactly why, what monitoring you need and which symptoms should prompt immediate medical attention. With appropriate monitoring and timely care, many women with high-risk pregnancies go on to have healthy pregnancies and healthy babies.

For pregnancy-related imaging and diagnostic investigations in Kolkata, Sparsh Diagnostic Centre provides specialised ultrasonography services including pregnancy scans, NT scans, anomaly scans, fetal echocardiography and Doppler studies.