Gestational Hypertension: Causes, Symptoms & Treatment

Introduction

A period of happiness and expectations, pregnancy can also be accompanied by unforeseen illnesses that require proper health care. One of those diseases is known as gestational hypertension.

It is truly frightening to learn that you have high blood pressure while you are pregnant. Not only do you worry about your own well-being, but you also worry about your child's health. The truth is, many women who suffer from gestational hypertension often go on to have healthy pregnancies and give birth to healthy children.

Gestational hypertension should not be confused with chronic hypertension, since the latter is something that may exist even before the pregnancy or develop before the 20th week of gestation. Gestational hypertension is when the blood pressure becomes elevated after the 20th week of pregnancy in women who did not have any hypertension before.

Knowing about gestational hypertension can help you recognise the condition early and understand why regular prenatal check-ups matter. The sections below explain what it is, why it develops, the signs to watch for, how doctors diagnose it, and the treatment and monitoring that help protect both mother and baby.

What is gestational hypertension?

Most women have normal blood pressure before and during the early months of pregnancy. Sometimes blood pressure starts rising after 20 weeks of pregnancy. If this happens without signs of organ damage or significant protein in the urine, doctors diagnose the condition as gestational hypertension.

Many women feel completely well when it develops, which is why regular prenatal check-ups are so important. Doctors usually confirm the diagnosis if blood pressure is 140/90 mmHg or higher on two separate readings taken at least four hours apart. Early diagnosis allows your healthcare team to monitor both you and your baby and take timely steps if needed.

When Does It Typically Develop?

Generally, hypertension occurs after the pregnancy period exceeds 20 weeks, that is, in the third trimester of the pregnancy. In many women, it is identified during routine antenatal visits before any symptoms develop.

How Common Is It?

Gestational hypertension affects around 2–8% of pregnancies worldwide. It is more common during a first pregnancy and in women with certain medical or pregnancy-related risk factors.

What Causes Gestational Hypertension?

The exact cause of gestational hypertension has not been completely understood yet. There are several factors that scientists suppose lead to gestational hypertension because they have an impact on blood vessel function.

Changes in Blood Vessels During Pregnancy

During pregnancy, there are natural physiological changes in the blood flow. Sometimes the blood vessels narrow or fail to change their diameter properly, thereby causing high blood pressure.

Placental Factors

The placenta provides oxygen and other nutrients to the fetus. Its development or blood flow can cause gestational hypertension.

Genetic and Environmental Influences

The presence of a family history of hypertension, genetics, and some lifestyle or environmental elements can predispose one to developing gestational hypertension.

Risk Factors That May Contribute

Various risk factors might contribute to this situation, such as:

• Hormonal changes
• Blood vessel changes
• Placental problems
• Immune system responses
• Maternal preexisting conditions

Despite having these risk factors, gestational hypertension can still be experienced even by healthy mothers.

Who Is at Risk of Developing Gestational Hypertension?

Any pregnant woman can develop gestational hypertension, but some factors increase the likelihood.

First Pregnancy

A first-time pregnancy will be riskier compared to a pregnancy that has occurred before without complications.

Multiple Pregnancy (Twins or More)

Pregnancy with twins or multiples increases the risk of high blood pressure in women due to the increased work required by the body for the heart and blood vessels.

Maternal Age

Women younger than 20 years or older than 35 years are more likely to develop hypertensive disorders during pregnancy.

Obesity

Being overweight or obese before pregnancy increases the risk because it places additional strain on the cardiovascular system.

Family or Personal History of Hypertension

A history of high blood pressure, either personal or that of a family member, is a known predisposing factor for the development of gestational hypertension.

Diabetes or Kidney Disease

A previous history of diabetes, renal problems, or any other form of illness can be a risk factor for hypertension during pregnancy.

Pregnancy Through IVF

Those who get pregnant via IVF have a slightly increased risk ofgestational hypertension. The various factors that could account for this include age, multiple pregnancy, and others.

Symptoms of Gestational Hypertension

In many cases, women with gestational hypertension do not experience any symptoms. That is why it is so vital to monitor one’s blood pressure regularly while undergoing prenatal care.

The possible symptoms of gestational hypertension include:

High Blood Pressure

In most cases, high blood pressure is symptomless. It is often detected during a routine prenatal examination.

Swelling of Hands and Face

Mild swelling can be normal during pregnancy. However, any sudden swelling on the hands, face, or in the area of the eyes must be examined by a doctor.

Persistent Headaches

If a headache is very painful, persistent, and fails to resolve with rest or prescribed medications, it may be due to high blood pressure.

Blurred Vision

Vision problems such as seeing flashes or having blurred vision need urgent medical attention.

Nausea or Vomiting

Although nausea is common early in pregnancy, nausea or vomiting that develops later in pregnancy, along with high blood pressure, should not be ignored.

Because these symptoms may also occur with other pregnancy conditions, they should always be evaluated by a healthcare provider.

Gestational Hypertension vs Preeclampsia

Although both conditions involve high blood pressure after 20 weeks of pregnancy,preeclampsia is a more serious condition because it affects other organs as well.

Gestational hypertension in some ladies may eventually lead to the development of preeclampsia. As a result, monitoring blood pressure, urine, and follow-up appointments is very important during pregnancy.

How Is Gestational Hypertension Diagnosed?

Early diagnosis is very crucial to safeguard the life of the mother as well as the baby. A healthcare practitioner uses several procedures and regular prenatal exams to diagnose gestational hypertension.

Blood Pressure Measurement

Blood pressure is measured at every prenatal appointment. If the reading is 140/90 mmHg or higher, the healthcare provider usually takes another measurement after 4 hours.

Urine Tests

It involves checking for protein in the urine. If protein is present in the urine, this suggests the condition may be preeclampsia rather than uncomplicated gestational hypertension.

Blood Test

Testing blood helps to determine the condition of various organs in the body. This can include testing for:

• Liver Function
• Kidney Function
• Platelet Count

Fetal Ultrasound

The ultrasound procedure can help in checking fetal growth, the level of amniotic fluid, and the condition of the placenta.

Non-Stress Test (NST)

Non-stress testing involves monitoring fetal heart activity and movement to assess fetal well-being.

Possible Complications of Gestational Hypertension

Several pregnant women who suffer from gestational hypertension experience a normal pregnancy, provided that the condition is diagnosed at an early stage. High blood pressure can lead to complications.

Progression to Preeclampsia

Preeclampsia is one such complication that can occur in some pregnant women and involves more than one organ.

Preterm Birth

An early delivery is indicated if the pregnancy poses a danger either to the mother or the child.

Placental Abruption

There is a small increase in the chances of having placental abruption due to high blood pressure, which entails the separation of the placenta from the uterus before childbirth. Placental abruption is uncommon but requires immediate treatment.

Restricted Fetal Growth

Inadequate blood flow to the placenta can affect fetal development and thus require regular ultrasound examinations.

Low Birth Weight

The infants may be low-birth-weight infants due to growth restriction and/or premature delivery.

Cesarean Delivery

Some women may require a cesarean section because of pregnancy-related complications. However, gestational hypertension alone does not mean a cesarean birth is always required.

Managing Gestational Hypertension

The treatment aims to maintain blood pressure at an optimal level while ensuring no risk to the mother or baby. It varies depending on the degree of hypertension and the gestational period.

Regular Prenatal Visits

Routine visits to an antenatal clinic can help monitor your blood pressure and identify any changes.

Blood Pressure Monitoring

Your doctor may advise checking your blood pressure at home between appointments and maintaining a record of the readings.

Medications (When Prescribed)

Not all women require medication. If blood pressure becomes significantly elevated, your doctor may prescribe medications considered safe during pregnancy. Always take medication exactly as prescribed.

Monitoring Baby's Growth

Regular ultrasounds will help monitor the baby's growth, the amount of amniotic fluid, and placental function.

Fetal Well-being Assessment

In addition to the methods mentioned, the doctors will perform certain tests to ensure the baby is safe and healthy. Some of these tests include the following:

• Non-stress test or NST
• Biophysical profile or BPP
• Doppler ultrasound (when necessary)

Lifestyle Measures That Support a Healthy Pregnancy

Healthy practices contribute to the mother's overall wellness and complement medical care.

Eat a Healthy Diet

Eat the following foods:

• Vegetables and fruits
• Grains
• Protein
• Sources of healthy fat
• Dairy products

Take the doctor's advice on matters related to your diet.

Stay Physically Active (As Advised)

Physical activities such as walking, when recommended by the doctor, keep you healthy throughout your pregnancy.

Drink Enough Fluids

It is important to consume enough fluids to keep the bodily functions working well.

Get Adequate Rest

Enough sleep is required for a healthy pregnancy.

Avoid Smoking and Alcohol

These substances pose a risk during pregnancy and must be avoided altogether.

Attend All Prenatal Appointments

Visiting your healthcare specialist regularly allows you to be monitored throughout pregnancy.

Does Gestational Hypertension Affect the Baby?

Gestational hypertension may affect many pregnant women, but most of their babies will be fine. Yet, sometimes high blood pressure might lower the supply of blood to the placenta, and therefore, monitoring is important.

Fetal Growth

Some babies may grow more slowly because they receive less oxygen and nutrients through the placenta.

Premature Birth

If complications develop, early delivery may be the safest option for both mother and baby.

Monitoring during Pregnancy

The baby’s development is monitored through:

• Growth ultrasounds
• Non-Stress Tests
• Evaluation of fetal movements

These tests can tell whether the pregnancy is progressing well.

Long-Term Outlook

Most babies who are born following gestational hypertension are expected to grow up normally.

Delivery Planning

The timing and method of delivery depend on the health of both mother and baby.

When Is Delivery Recommended?

If the case is not complex, delivery is advised at 37 weeks. Earlier delivery might become necessary if your high blood pressure becomes harder to control.

Vaginal Delivery or C-Section

Most patients with gestational hypertension can have a normal vaginal birth.

A cesarean delivery will be considered if there are any fears about the well-being of the baby or complications with the delivery process itself.

Factors That Influence Delivery Decisions

Among them are:

• Control of blood pressure
• Length of pregnancy
• Development of the baby
• Activity of the placenta
• State of health of the mother and the baby

What Happens After Delivery?

For most women, gestational hypertension usually resolves after delivery, but follow-up is still necessary.

Does Blood Pressure Return to Normal?

Normal blood pressure usually returns a few weeks after delivery. However, some women will experience high blood pressure that requires follow-up.

Postpartum Monitoring

Your doctor will check your blood pressure after birth to see that it returns to normal.

Risk in Future Pregnancies

A woman with gestational hypertension is at a higher risk of having it in subsequent pregnancies. Early prenatal care is very important.

Long-Term Heart Health

Hypertensive disorders during pregnancy increase the risk of hypertension and heart problems in the long run. Good health practices can help you stay healthy throughout your pregnancy and even reduce the risk of complications.

Can Gestational Hypertension Be Prevented?

There is no sure way to prevent gestational hypertension since it could even affect healthy women. Nonetheless, certain healthy practices and lifestyle modifications can play a role in preventing gestational hypertension.

• Try to maintain a healthy weight while trying to get pregnant.
• Attend all prenatal appointments.
• Adhere to the doctor's advice throughout pregnancy.

Do note that some women suffer from gestational hypertension even when they are very healthy and despite taking all precautions.

Conclusion

Gestational hypertension should not worry you too much since it doesn’t mean that you cannot give birth to a healthy baby. If you take prenatal care seriously and seek appropriate medical assistance on time, there is no reason for your pregnancy not to end positively.

Firstly, it's crucial to attend all your prenatal visits and inform your healthcare provider of any unusual symptoms that may occur during your pregnancy. Thanks to early medical care, you will be able to receive proper monitoring of your overall health and your baby's health.

Remember, a diagnosis of gestational hypertension is not the end of a healthy pregnancy. Many women, despite their health condition, will go on to experience a normal pregnancy and have a healthy baby with the help of proper medical attention and guidance. Just take things one step at a time and do not be afraid to contact your healthcare professionals.