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Hypertensive Call your provider

Gestational hypertension

Also known as Pregnancy-induced hypertension. After 20 weeks.

Gestational hypertension is new high blood pressure after 20 weeks in someone whose readings were normal before, without the urine protein or organ changes that mark preeclampsia. On its own it is usually mild and silent. It matters because of where it can lead: up to half of those who have it go on to preeclampsia, so it calls for closer watching, not panic. In most cases blood pressure returns to normal once the baby is born.

Know the warning signs When to call a provider
How common
About 6% of pregnancies
Roughly 6% to 8% depending on the population.
When
After 20 weeks
In someone who was previously normotensive.
Urgency
Call your provider
Watch for signs it is progressing to preeclampsia.
Outlook
Usually resolves
Blood pressure typically normalizes within 12 weeks of birth.

Understanding it

What is gestational hypertension?

Gestational hypertension is a blood pressure of 140/90 or higher that first appears after 20 weeks in someone not hypertensive before. What sets it apart from preeclampsia is what is missing: no protein in the urine, no sign that other organs are affected. It is common, at roughly 6% of pregnancies.

Three related conditions line up by timing. Before 20 weeks, high blood pressure is chronic hypertension. After 20 weeks with no organ signs, it is gestational hypertension. After 20 weeks with protein in the urine or other organ involvement, it is preeclampsia. They sit on a spectrum, and one can shade into the next.

That shading is why gestational hypertension is monitored, not dismissed. Up to half eventually develop preeclampsia, the more so when it starts early. Because it rarely causes symptoms, it surfaces through the blood pressure and urine checks at your prenatal visits.

For most people, it means closer monitoring and delivery around term, with blood pressure normalizing after birth. It leaves one lasting signal: having had it raises your long-term risk of high blood pressure and heart disease, a reason to mind your cardiovascular health going forward.

Symptoms

What are the symptoms?

Gestational hypertension usually causes no symptoms and turns up on routine blood pressure checks. The symptoms to watch for are the ones that flag a turn toward preeclampsia.

Early signs

  • Usually none
  • The only sign is often the high blood pressure reading itself

Emergency signs — call 911

  • A severe or persistent headache
  • Changes in vision, such as blurriness, spots, or flashing lights
  • Pain in the upper belly, under the ribs on the right side
  • Sudden swelling of the face and hands, or shortness of breath
  • A blood pressure reading of 160/110 or higher

Why it matters

Risks to you and baby

Progression to preeclampsia

The main concern. Up to half go on to preeclampsia, which adds organ involvement and greater risk. Monitoring is built to catch that shift early.

Severe-range blood pressure

Very high blood pressure (160/110 or above) is dangerous in its own right and needs prompt treatment to guard against stroke and other harm.

Effects on your baby

If it progresses or pressure runs high, placental blood flow can suffer, slowing your baby's growth or prompting an earlier delivery. Growth is monitored for that reason.

Future cardiovascular risk

Having had it raises your long-term risk of high blood pressure and heart disease, a useful early signal to look after your heart after pregnancy.

How it's found

How is it diagnosed?

Gestational hypertension is diagnosed on blood pressure readings, then separated from preeclampsia by confirming the urine and organ tests are normal.

Blood pressure measurement

A reading of 140/90 or higher on two occasions at least 4 hours apart, after 20 weeks in someone previously normal, defines it. A reading of 160/110 or higher is severe range and needs prompt treatment.

Urine protein test

A normal result separates it from preeclampsia, where protein spills into the urine. It is rechecked over time.

Blood tests

Platelet count, liver enzymes, and kidney function confirm the organs are uninvolved; if they are, it is preeclampsia.

Fetal growth monitoring

Ultrasounds track your baby's growth, since higher blood pressure can affect placental blood flow.

Found on routine blood pressure checks at prenatal visits after 20 weeks. New high readings trigger the urine and blood tests and closer follow-up.

Treatment

How is it managed?

Management watches for progression to preeclampsia, treats blood pressure that reaches the severe range, and plans delivery around term.

Treatment paths

Care is usually expectant, close monitoring rather than early delivery: more frequent visits, sometimes home blood pressure checks, repeat urine and blood tests, and growth ultrasounds. Severe-range blood pressure is treated with medication.

Medication

Antihypertensives such as nifedipine, labetalol, or hydralazine treat severe-range blood pressure. Magnesium sulfate is added only if it progresses to preeclampsia with severe features.

Monitoring

Blood pressure, urine protein, blood tests, and your baby's growth are followed through the rest of pregnancy, and your pressure is checked in the weeks after birth.

Can it recur?

It can recur and raises your long-term cardiovascular risk. If your pressure has not normalized by about 12 weeks after birth, it is reclassified as chronic hypertension. Next pregnancy, your provider may recommend low-dose aspirin to lower the preeclampsia risk.

What you can do

Can it be prevented?

  • Low-dose aspirin if you are at higher risk

    If you carry preeclampsia risk factors, a daily 81 mg aspirin started between 12 and 28 weeks, ideally before 16, lowers the chance of preeclampsia developing on top of gestational hypertension.

  • Keep every prenatal visit

    Because it is usually silent, the blood pressure and urine checks at routine visits are how it is found and followed. Do not skip them, especially in the third trimester.

  • Mind your heart after pregnancy

    Since it signals higher future cardiovascular risk, ongoing blood pressure checks and heart-healthy habits after pregnancy are worthwhile.

Who is more at risk

Risk factors

A prior hypertensive pregnancy
Having had gestational hypertension or preeclampsia before raises the odds of a repeat.
A first pregnancy
First pregnancies carry a higher baseline risk.
Chronic conditions
Diabetes, kidney disease, and autoimmune conditions such as lupus increase risk.
Carrying multiples
Twins or more raise the cardiovascular demand and the risk.
Age, weight, and family history
Being under 20 or over 35, obesity, a family history, and Black race all add to the risk.

Do not wait

When to call your provider or 911

  • Contact your provider promptly, or go in, for a severe or persistent headache, vision changes, upper-right belly pain, sudden swelling of the face and hands, or shortness of breath, any of which can mean preeclampsia is developing.
  • Be seen right away for a home blood pressure reading of 160/110 or higher; call your provider for readings at or above 140/90 if you are not already being followed.
  • Report a noticeable decrease in your baby's movements.
  • Keep your closer follow-up visits so blood pressure, urine, and your baby's growth stay tracked.
  • After birth, watch for these same warning signs, since high blood pressure and preeclampsia can occur postpartum.

Talking to your team

Questions to ask your provider

  • Is this gestational hypertension, or are there signs of preeclampsia?
  • How often should I have my blood pressure and urine checked, and should I monitor at home?
  • What reading should prompt me to call or come in?
  • When are you planning for me to deliver?
  • Should I be on low-dose aspirin, now or in a future pregnancy?
  • What follow-up do I need after birth to be sure my blood pressure returns to normal?

Keep reading

More on gestational hypertension

All pregnancy guides articles

Good to Know

Gestational hypertension FAQs

Common questions about gestational hypertension, answered.

What is the difference between this and preeclampsia?

Gestational hypertension is high blood pressure after 20 weeks with no urine protein and no organ involvement. Add those organ signs and it is preeclampsia. They share a spectrum, and gestational hypertension can progress to preeclampsia, which is why it is watched.

Will my gestational hypertension turn into preeclampsia?

It might. Up to half go on to preeclampsia, the more so when it starts earlier. Regular monitoring is meant to catch that shift the moment it happens.

I feel completely fine. Why does this matter?

Because high blood pressure is usually silent, and the risk lies not in how you feel but in where it can lead. Monitoring lets your team catch preeclampsia or a severe reading early, when it is safest to act.

Will I have to deliver early?

Often delivery is planned around 37 weeks, balancing the small added risk of continuing against more time for your baby. If it progresses to preeclampsia, delivery may come earlier.

Do I need blood pressure medication?

Only if your blood pressure reaches the severe range (160/110 or higher). Milder gestational hypertension is usually managed with monitoring rather than medication, though this is individualized.

Will my blood pressure go back to normal?

Usually, yes. Blood pressure typically normalizes within about 12 weeks of birth. If it stays high beyond that, it is reclassified as chronic hypertension and managed as an ongoing condition.

Will it happen again, and does it affect my future health?

It can recur, and it raises your long-term risk of high blood pressure and heart disease, a helpful early signal: keep up blood pressure checks and heart-healthy habits, and ask about low-dose aspirin next time.

Should I check my blood pressure at home?

Often yes, and your provider can suggest a cuff and a target. Home readings track trends between visits, but call in for any reading of 160/110 or higher, or for the warning signs of preeclampsia.

Medically Reviewed · Updated

Reviewed by Dr. Grace Lin, MD, FACOG · OB-GYN

Obstetrician-gynecologist focused on reproductive and sexual health for women: pregnancy, BV, yeast, trichomoniasis and HPV/cervical screening. Our editorial guidelines →

6 Sources

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