Preeclampsia in Pregnancy: Diagnosis and Care in India

• Preeclampsia is new high blood pressure (140/90 mmHg or higher) after 20 weeks plus evidence of organ strain such as protein in the urine, low platelets, or abnormal liver or kidney tests.
• It can be present and progressing while you feel completely well, which is why every antenatal visit checks your BP and urine even with no symptoms.
• Red flags that need same-day care: severe headache, blurred or flashing vision, pain below the ribs on the right, sudden swelling of the face or hands, or reduced baby movements.
• The only cure is delivery of the baby and placenta; medicines (magnesium sulfate for severe cases, plus BP-lowering drugs) keep you safe until the right time to deliver.
• In India, screening, magnesium sulfate, BP medicines and delivery are free at government facilities under JSSK, and PMSMA offers a free specialist antenatal check on the 9th of every month.
• If you have had preeclampsia or other high-risk factors, low-dose aspirin started before 16 weeks in your next pregnancy cuts the risk of recurrence substantially.

Preeclampsia is a disorder unique to pregnancy. It is defined as new high blood pressure (systolic 140 mmHg or higher, or diastolic 90 mmHg or higher) appearing after 20 weeks in a woman whose blood pressure was previously normal, together with signs that one or more organs are being affected.

It begins in the placenta. Early in pregnancy the placenta does not anchor itself as deeply as it should into the blood vessels of the womb. This leads to a poorly supplied placenta that releases inflammatory and blood-vessel-narrowing factors into the mother's circulation. The result is the whole-body picture of preeclampsia: raised blood pressure, leaky blood vessels (so protein escapes into the urine and fluid builds up), and strain on the liver, kidneys and brain. If the brain becomes irritable enough, seizures can follow, which is called eclampsia.

Several things make a woman more likely to develop preeclampsia: a first pregnancy, age under 20 or over 35, pre-existing high blood pressure, diabetes, thyroid, kidney or autoimmune disease, a twin or multiple pregnancy, a body mass index above 30, a family history in a mother or sister, and a previous pregnancy affected by preeclampsia. A previous episode carries roughly a 15 to 20 percent chance of recurrence, rising to about half if the first episode was early or severe. Pre-existing conditions like high blood pressure in women and gestational diabetes often travel together and add up.

Early detection is the whole game. The blood pressure and urine check done at every antenatal visit exists precisely to catch preeclampsia before it turns severe. In India, the Pradhan Mantri Surakshit Matritva Abhiyan (PMSMA) provides a free specialist antenatal consultation, including these checks, on the 9th of every month at government facilities. ASHA workers and ANMs in the community are trained to spot warning signs and refer urgently through the PHC, CHC and district hospital pathway. When preeclampsia is found early and managed properly, the risk to mother and baby falls dramatically.

Two findings are needed for a diagnosis: new high blood pressure after 20 weeks, and evidence that an organ is being affected.

The blood pressure must be 140/90 mmHg or higher on two readings at least four hours apart, taken with the right cuff size while you are seated and relaxed. One high reading is not enough. A cuff that is too small for a larger arm gives a falsely high number, and clinic anxiety (white-coat effect) can raise readings too, which is why doctors increasingly use home blood pressure monitoring to confirm whether the rise is real and sustained.

Any one of the following confirms organ involvement:

Protein in the urine is the classic sign, but it is no longer essential for the diagnosis. Since 2014, ACOG and later FOGSI, NICE and ISSHP recognised that some women develop preeclampsia with prominent liver or platelet involvement and little protein, and waiting for protein to appear only delays treatment.

A few related conditions are worth separating. High blood pressure diagnosed before 20 weeks is chronic hypertension, a different condition, although a woman with it can develop superimposed preeclampsia. High blood pressure after 20 weeks with no organ involvement is gestational hypertension, which needs watching because about a quarter of cases progress to preeclampsia. Rarely, preeclampsia appears in unusual ways, including up to six weeks after delivery, which is covered in our guide to postpartum and late-onset preeclampsia. When preeclampsia is suspected, the usual tests are BP measurement, urine dipstick and protein-creatinine ratio, a complete blood count, liver and kidney function tests, and uric acid.

How severe the preeclampsia is decides everything that follows: whether you are admitted or monitored at home, whether you need magnesium sulfate, how soon you deliver, and how closely the baby is watched. FOGSI, ACOG and ISSHP divide preeclampsia into non-severe (once called mild) and preeclampsia with severe features. The shift away from the word mild is deliberate, because no preeclampsia is truly mild; any case can turn severe quickly.

Non-severe preeclampsia means the diagnosis is met but none of the severe features below are present. Blood pressure sits between 140/90 and 160/110, any protein loss is modest, liver enzymes and platelets are near normal, and there are no warning symptoms. This is often managed with close monitoring (sometimes at home with twice-weekly checks), BP medicine if readings climb, a course of antenatal steroids for the baby's lungs if before 34 weeks in case early delivery is needed, and planned delivery at 37 weeks if things stay stable.

Preeclampsia with severe features is a medical emergency, defined by any one of the following:

The presence of even one severe feature changes management completely: immediate hospital admission, magnesium sulfate to prevent seizures, careful blood-pressure lowering, and planning to deliver within hours to days whatever the gestation, with steroids first if before 34 weeks.

HELLP syndrome is a severe variant with prominent liver and blood involvement (Haemolysis, Elevated Liver enzymes, Low Platelets). It can appear with little high blood pressure or protein and is sometimes mistaken for jaundice, gallstones or a stomach bug. The treatment is the same as severe preeclampsia: stabilise and deliver. Seizures (eclampsia) are covered in detail in our companion guide on eclampsia emergency management.

Untreated or poorly controlled preeclampsia can cause serious harm, which is why it is managed so carefully. The most feared complication is eclampsia (seizures), occurring in roughly 2 to 3 percent of severe cases; magnesium sulfate prevents the great majority of these. Other risks include placental abruption (the placenta separating early), which is several times more common in preeclampsia and causes bleeding and danger to the baby; heavy bleeding after birth; acute kidney injury, which usually recovers; fluid in the lungs; HELLP syndrome; and, rarely, stroke. Recognising abruption early matters, so it has its own guide on placental abruption in pregnancy.

The effects can reach beyond pregnancy. Women who have had preeclampsia, especially early or severe disease, carry roughly double the lifetime risk of high blood pressure, heart disease and stroke, usually emerging in middle age. This makes a long-term plan of BP checks, healthy weight, activity and screening for diabetes and cholesterol worthwhile. It is easily overlooked, so it helps to tell your future family doctor that you had preeclampsia.

For the baby, the main risks come from a placenta that cannot fully supply it. These include growth restriction in roughly 15 to 20 percent of cases, preterm birth in about 30 percent (mostly planned early delivery to protect the mother), the consequences of abruption, and, in severe early disease, stillbirth. Most of the danger to the baby concentrates in early, severe preeclampsia where delivery may be needed before the baby is mature. This is why close fetal surveillance, described later, is central to care.

Magnesium sulfate is the single most important medicine in severe preeclampsia. It is given to every woman with severe features and to anyone who has had an eclamptic seizure. The evidence is strong: the large international Magpie Trial (over 10,000 women, including in India) showed magnesium sulfate roughly halves the risk of eclampsia compared with placebo, and earlier trials showed it is far better than diazepam or phenytoin for treating seizures once they start.

It is on the WHO and Indian essential-medicines lists, freely available at every government facility from the primary health centre upwards under JSSK, and very cheap, around Rs 50 to 200 a vial. The most common Indian protocol is the Pritchard regimen, which works without an infusion pump and so suits facilities at every level: a 4 g intravenous loading dose over 10 to 15 minutes plus 10 g intramuscularly (5 g into each buttock), then 5 g into alternating buttocks every four hours for 24 hours. Where infusion pumps are available, the Zuspan regimen (4 g IV load then 1 g per hour by pump) gives smoother levels and is preferred in tertiary centres.

Magnesium has a narrow safety margin, so monitoring before each maintenance dose is essential. Nurses check three things: the knee-jerk reflex (lost first if levels are too high), the breathing rate (kept above 12 per minute), and urine output (kept above 30 ml per hour, since magnesium leaves the body through the kidneys). A dose is held if the reflex is absent, breathing is slow, or urine output is low. If toxicity occurs, it is reversed with intravenous calcium gluconate. Given by trained staff with this routine monitoring, magnesium sulfate is very safe; millions of doses are given each year in Indian maternity care. It is continued for 24 hours after delivery, or after the last seizure, and then stopped.

Blood pressure control is the second pillar of treatment. The aim is to bring severely high readings (160/110 or above) down into a safer range (around 140 to 150 systolic) to reduce the risk of stroke, lung fluid and abruption, without dropping the pressure so low that blood flow to the placenta suffers. The target is controlled lowering, not a perfectly normal number, because over-treatment can reduce the baby's blood supply.

The first-line oral medicines recommended by FOGSI and ACOG are labetalol, long-acting nifedipine and methyldopa, all with established pregnancy safety. Labetalol (Lobet, Normadate, generic) usually starts at 100 mg twice daily. Nifedipine is used in the retard or extended-release form (Calcigard Retard, Nicardia Retard); short-acting nifedipine is avoided for routine use because it can drop pressure too suddenly. Methyldopa (Aldomet, generic) has the longest track record but can cause drowsiness and low mood, so it is used less often as first choice. These medicines typically cost Rs 30 to 150 a month.

For sudden severe hypertension in hospital, intravenous labetalol or oral immediate-release nifedipine is used to bring the pressure down quickly, with intravenous hydralazine as an alternative in some centres. Certain drugs are strictly avoided in pregnancy because they harm the baby: ACE inhibitors, angiotensin receptor blockers, diuretics and atenolol. Any woman planning a pregnancy while taking these should have them switched to a pregnancy-safe option beforehand.

It is important to be honest that BP medicines do not cure preeclampsia. The underlying placental problem keeps progressing, and the only definitive treatment is delivery. What the medicines do is buy time safely, reduce the immediate danger from very high pressure, and allow steroids to be given for the baby's lungs if needed. Together with magnesium sulfate and well-timed delivery, they are what keep mother and baby safe.

Deciding when to deliver balances the mother's risk from continuing the pregnancy against the baby's risk from being born too early. FOGSI guidance follows international consensus from ACOG, ISSHP and NICE.

For non-severe preeclampsia, planned delivery at 37 weeks is standard, because by then the baby is essentially term and continuing offers no benefit. Before 37 weeks, if everything is stable, the pregnancy is watched closely with twice-weekly checks of BP, bloods and urine and weekly fetal monitoring, and delivery is brought forward if severe features develop or mother or baby deteriorate.

For preeclampsia with severe features, timing depends on gestation. At 34 weeks or later, delivery within a day or two is standard once the mother is stabilised. Between 24 and 33 weeks, if the situation can be safely controlled, doctors at a tertiary centre may try to gain days or weeks with intensive monitoring and a course of antenatal steroids for the baby's lungs, delivering sooner if the mother worsens (uncontrolled BP, falling platelets, HELLP, eclampsia, abruption) or the baby shows distress on monitoring or umbilical artery Doppler. Before 24 weeks the decisions are very difficult and highly individual.

Delivery is not automatically a caesarean. Vaginal birth by induction is preferred where feasible, as it carries less bleeding and infection risk, and many stable women deliver this way. The caesarean rate is higher in preeclampsia (around 30 to 50 percent) because of fetal distress, abruption, failed induction or severe maternal illness. Whether anaesthesia can be regional (epidural or spinal) depends partly on the platelet count.

Delivery starts the recovery but does not end the risk overnight. Magnesium sulfate continues for 24 hours, BP medicines often continue for weeks, and the first 72 hours need close watching. Preeclampsia can even appear for the first time after birth, so the postnatal check should always include a BP and urine review.

In non-severe preeclampsia managed as an outpatient, monitoring means twice-weekly visits with BP and urine checks, weekly blood tests (full blood count, liver and kidney function, uric acid), and a symptom review each time. Twice-daily home blood pressure monitoring with a validated upper-arm device helps catch a rising trend between visits. You should be told clearly which symptoms mean come in now, listed in the next section.

In severe preeclampsia in hospital, monitoring is intensive: BP every 15 minutes during stabilisation then every one to two hours, hourly urine output through a catheter, blood tests every 6 to 24 hours, and reflexes, breathing rate and oxygen levels before every magnesium dose. Fluids are kept tight (often around 80 ml an hour) because these patients are prone to fluid building up in the lungs.

The baby is watched with a combination of tools, scaled to severity. The non-stress test (NST) tracks the baby's heart rate and is done twice weekly in non-severe disease and daily when severe. The biophysical profile adds an ultrasound look at the baby's movements, tone and fluid. Umbilical artery Doppler measures how well the placenta is working, and an abnormal result is a strong signal for delivery. Serial growth scans every two to three weeks track the baby's size. Our guide to NST, BPP and CTG fetal monitoring explains each test, and umbilical and MCA Doppler in growth restriction covers Doppler in depth. At home, counting your baby's kicks daily and reporting any reduction promptly is part of the package.

Preeclampsia can be silent, so any new high reading after 20 weeks deserves a proper check even if you feel fine. But certain symptoms mean you should be seen the same day, without waiting for your next appointment. Use the 102 Janani Express or 108 ambulance to reach a facility if you cannot travel safely.

Mild ankle swelling is common and usually harmless in pregnancy, as our guide to swelling and edema in pregnancy explains. What is concerning is sudden swelling of the face or hands, especially with a headache or visual changes. Likewise, occasional pregnancy headaches are normal (see headaches in pregnancy), but a severe, persistent headache that does not settle with rest and paracetamol is a warning sign.

Recovery after a preeclampsia delivery has distinct phases. The first 72 hours carry the highest remaining seizure risk (about a third of eclamptic seizures happen after birth), so magnesium sulfate continues for 24 hours. Blood pressure often rises in the first few days as fluid shifts back into the circulation, then settles over days to weeks while BP medicines are gradually reduced. Most women are off them by 6 to 12 weeks, though 10 to 20 percent have lasting high blood pressure that needs ongoing care.

Follow-up should include a BP check at one to two weeks, a fuller review at four to six weeks with BP, urine and bloods, and ideally a heart-health assessment by three months, because a preeclampsia pregnancy roughly doubles future cardiovascular risk. Make sure your GP or physician knows your history so that BP, weight, lipids and diabetes can be watched over the years.

For a future pregnancy, low-dose aspirin is the single most effective preventive step. Started before 16 weeks and continued to 36 weeks, aspirin 75 to 150 mg daily (commonly 150 mg in India) reduces preterm preeclampsia by around 60 percent in high-risk women, based on the ASPRE trial and earlier reviews. It is cheap (Rs 30 to 50 a month), safe and well tolerated. High-risk women who should take it include those with previous preeclampsia, chronic hypertension, diabetes, kidney disease, autoimmune disease such as lupus, or a combination of moderate risk factors. Your obstetrician will assess this early; our overview of high-risk pregnancy stratification in India explains how this is decided.

Calcium supplementation of about 1.5 g a day also lowers preeclampsia risk in populations with low dietary calcium, which includes most of India. Building calcium into your diet through dairy and non-dairy sources helps too. If you have had repeated early severe preeclampsia, a thrombophilia workup may be considered.

The cost of preeclampsia care varies hugely between the public and private sectors. In government facilities, the Janani Shishu Suraksha Karyakram (JSSK) makes essentially everything free for every pregnant woman regardless of income: consultation, BP and urine checks, blood tests, fetal monitoring, BP medicines, magnesium sulfate, steroids, delivery (normal or caesarean), NICU care for the baby, postnatal care, and free transport via the 102 Janani Express or 108 ambulance. JSSK is the backbone of universal maternity access in India.

In the private sector the costs add up. As a rough guide: an obstetrician consultation runs Rs 500 to 2,500; a complete blood count Rs 200 to 500; liver function tests Rs 400 to 1,000; an NST Rs 500 to 1,500; a biophysical profile Rs 1,500 to 3,000; umbilical Doppler Rs 1,000 to 2,500; BP medicines Rs 30 to 150 a month; a full magnesium sulfate course Rs 500 to 2,000; and a course of steroids Rs 400 to 800. NICU admission can run Rs 15,000 to 50,000 a day depending on the level of care.

Several schemes bridge these costs. Ayushman Bharat (PMJAY) covers up to Rs 5 lakh per family a year of secondary and tertiary care, including caesarean and NICU, at empanelled government and private hospitals for lower-income households. State schemes such as Tamil Nadu's CMCHIS, Aarogyasri in Andhra Pradesh and Rajasthan's Chiranjeevi Yojana add further cover, alongside CGHS, ESI and private insurance. The portable ABHA digital health ID helps keep antenatal records together across referrals, which matters in preeclampsia where care often moves between facility levels. The honest bottom line is that no family should delay seeking care for fear of cost; the JSSK pathway alone provides full free treatment at any government facility.

• WHO recommendations: Drug treatment for severe hypertension in pregnancy
• ACOG Gestational Hypertension and Preeclampsia (Practice Bulletin)
• NICE NG133: Hypertension in pregnancy: diagnosis and management
• The Magpie Trial: magnesium sulphate for women with pre-eclampsia (The Lancet, 2002)
• Aspirin versus Placebo in Pregnancies at High Risk for Preterm Preeclampsia, ASPRE (NEJM, 2017)
• ISSHP classification, diagnosis and management of hypertensive disorders of pregnancy (2018)
• Janani Shishu Suraksha Karyakram (JSSK), Ministry of Health and Family Welfare, India