Preeclampsia, HELLP Syndrome, and Birth Injury — When Dangerous Blood Pressure Is Missed or Mismanaged

Most parents first hear the word preeclampsia at a routine prenatal visit, attached to a blood-pressure reading and a request for a urine sample. It sounds like a problem that belongs to the mother. And it is — preeclampsia can cause a mother to have a seizure, a stroke, or liver and kidney failure. But the reason a hypertensive disorder of pregnancy sits at the center of so many catastrophic birth-injury cases is that it is also a disease of the placenta, the organ that feeds the baby. When it is caught and managed, most mothers and babies do well. When rising pressures and warning labs are watched but not answered, the same disease that threatens the mother can quietly starve the baby.

This is a plain-English guide to preeclampsia and its severe cousins — HELLP syndrome and eclampsia — for parents trying to understand what happened. It explains how a blood-pressure problem becomes a baby’s oxygen problem, the specific numbers and timelines the standard of care is built around, why some of the most dangerous cases hide behind near-normal blood pressure, and where the line falls between a hard pregnancy no one could have changed and a preventable injury.

What Are Preeclampsia, HELLP Syndrome, and Eclampsia?

Preeclampsia is a disorder, usually appearing after 20 weeks of pregnancy, in which a woman develops high blood pressure together with signs that her organs are under strain. The American College of Obstetricians and Gynecologists (ACOG) defines the blood-pressure threshold as 140/90 or higher on two occasions at least four hours apart. Preeclampsia is diagnosed when that new high blood pressure is paired with protein in the urine — or, even without proteinuria, with other signs of organ trouble such as a low platelet count, abnormal liver or kidney tests, fluid in the lungs, or new headache and visual disturbances.

Two more severe forms matter for this discussion. HELLP syndrome is a name built from what the blood tests show: Hemolysis (red blood cells breaking apart), Elevated Liver enzymes, and Low Platelets. Eclampsia is the occurrence of seizures in a woman with preeclampsia. Both are obstetric emergencies. The condition exists on a spectrum, and a key point in these cases is that it can move along that spectrum quickly — a woman who looks like “mild” preeclampsia in the morning can have severe features by night.

How Does Preeclampsia Hurt the Baby?

A hypertensive disorder injures the baby indirectly, through the placenta, in three main ways. Preeclampsia begins with abnormal development of the placental blood vessels. Those same faulty vessels that drive the mother’s high blood pressure also deliver less blood, oxygen, and nourishment to the baby. The harm to the baby follows from that shared root:

• Slow starvation over weeks (uteroplacental insufficiency). A placenta that cannot keep up leads to fetal growth restriction (IUGR) and low amniotic fluid — a baby that grows too slowly because the supply line is failing.
• A sudden emergency (placental abruption). High blood pressure is a leading risk factor for placental abruption, the premature separation of the placenta that can cut off oxygen within minutes and cause hypoxic-ischemic encephalopathy (HIE).
• The consequences of the cure (indicated prematurity). The only definitive treatment for preeclampsia is delivery of the baby and placenta. When the disease turns severe well before term, the baby must be delivered early, and prematurity carries its own risks. Many preeclampsia birth injuries flow not from the disease directly but from the early delivery it forces.

In the most acute cases, a placenta already running at its limit can no longer buffer the stress of labor, and the baby shows it on the monitor — the same failing supply that shows up on the mother’s chart as a climbing blood pressure shows up on the baby’s tracing as distress.

What Blood Pressure Is Dangerous — and How Fast Must It Be Treated?

The single most important number in these cases is 160/110. ACOG classifies a systolic pressure of 160 or higher, or a diastolic of 110 or higher, as severe-range blood pressure. Severe-range pressure is what leads to the catastrophic maternal events — stroke and seizure — and it is treated as a stand-alone emergency regardless of everything else going on.

ACOG’s guidance on this point is specific and is one of the clearest bright lines in obstetrics. In its Committee Opinion on emergent therapy for acute-onset severe hypertension, ACOG advises that acute-onset, severe-range blood pressure that persists for 15 minutes or more should be treated with a first-line antihypertensive — IV labetalol, IV hydralazine, or oral immediate-release nifedipine — as soon as possible, ideally within 30 to 60 minutes. A severe-range pressure sitting untreated in the chart for hours, with no medication given and no explanation, is exactly the kind of documented-but-unanswered warning these cases turn on.

Why HELLP Syndrome Is So Often Missed

HELLP syndrome is dangerous partly because it does not always look like a blood-pressure problem. A significant share of women with HELLP have blood pressure that is only mildly elevated, and some are near normal at presentation. Instead of an alarming cuff reading, the first complaint is often pain in the upper-right abdomen or the pit of the stomach, nausea, vomiting, or a vague sense of feeling profoundly unwell. Those symptoms are easy to file under the flu, heartburn, or a gallbladder attack — and sending a woman with early HELLP home with reassurance is one of the recognized ways these cases go wrong.

This is why laboratory testing is part of the standard of care, not an optional extra. A complete blood count, liver function tests, and kidney function tests can reveal HELLP or severe preeclampsia even when the blood-pressure number is not screaming. Preeclampsia can also reach its severe form purely through the labs and symptoms — a falling platelet count, rising liver enzymes, a persistent headache that does not respond to medication, or visual changes such as flashing lights or blurring. A team that anchors on the cuff alone, and does not look at the labs and the symptoms, can badly misjudge how sick both patients really are.

When Should the Baby Be Delivered?

Because delivery is the only cure, the timing of delivery is where much of the medical judgment — and much of the litigation — lives. ACOG’s framework balances the risk of leaving the baby in a deteriorating environment against the risks of prematurity, and it sets recognized thresholds:

• Preeclampsia without severe features: delivery is generally recommended at 37 weeks, once the risks of continuing outweigh the modest benefit of more time.
• Preeclampsia with severe features: delivery is generally recommended at 34 weeks, and sooner — sometimes immediately after the mother is stabilized — if the mother’s condition or the baby’s status is worsening.
• Eclampsia, HELLP, abruption, or an unstable mother or baby: delivery after maternal stabilization regardless of gestational age.

When delivery is anticipated before 34 weeks, antenatal corticosteroids are given to help the baby’s lungs mature. The steroid course is not a reason to delay a delivery that a deteriorating mother or baby requires; balancing that window is part of the judgment. A pattern that recurs in these cases is a pregnancy with clearly documented severe features that was allowed to continue past the point the guidelines describe, without a reason recorded in the chart, while the baby’s condition slipped.

What About Preventing Preeclampsia in the First Place?

For women at high risk, there is a recognized preventive step: low-dose aspirin. The U.S. Preventive Services Task Force (USPSTF) recommends low-dose (81 mg) aspirin daily, started between 12 and 28 weeks of pregnancy — ideally before 16 weeks — for women at high risk of preeclampsia, and ACOG endorses this. High-risk factors include a prior pregnancy with preeclampsia, chronic high blood pressure, pregestational diabetes, kidney disease, autoimmune conditions such as lupus, and carrying more than one baby.

This matters in a birth-injury analysis because it means preeclampsia risk is something prenatal care is expected to assess early. A prenatal record that identified a high-risk mother but never discussed or offered aspirin prophylaxis is not, by itself, proof of anything — but it is one of the threads a careful review follows when a preventable-seeming injury has occurred.

Can Preeclampsia Happen After the Baby Is Born?

Yes — and postpartum preeclampsia is dangerous precisely because everyone’s guard is down. Preeclampsia can develop or worsen in the days and up to about six weeks after delivery. Once the baby has safely arrived, the intense monitoring of labor gives way to discharge, and a mother’s new headache, upper-abdominal pain, swelling, or visual changes can be dismissed as the ordinary aftermath of childbirth. Left unrecognized, postpartum preeclampsia can progress to seizure or stroke.

This is more a threat to the mother than to the newborn, so it sits at the edge of what a “birth injury” site covers. But it belongs here for two reasons: a failure to warn a discharged mother about the warning symptoms, and a failure to respond when she returns reporting them, are each recognized ways the standard of care can be missed. Severe-range blood pressure after delivery is treated on the same urgent 30-to-60-minute timeline as before it.

When Does Preeclampsia Point to Possible Negligence?

Preeclampsia is common, and having it is not evidence that anyone did anything wrong. As with every topic on this blog, the question a birth-injury review asks is not whether the disease occurred but whether the response to it met the standard the situation demanded. The questions that tend to decide these cases are concrete:

• Were rising blood pressures and warning symptoms across prenatal visits recognized and acted on — or charted visit after visit without a change in plan?
• When a pressure reached severe range (160/110), was it treated within the expected window — or left sitting in the record?
• Was magnesium sulfate started for seizure prophylaxis when severe features were present?
• Was laboratory testing ordered to catch HELLP, especially when a mother reported upper-abdominal pain or simply felt unwell?
• Was the baby monitored for growth restriction and, in labor, watched with continuous fetal monitoring for signs of distress?
• Did delivery happen at the point the guidelines describe — and once an emergency was recognized, was the decision-to-incision time reasonable?

When the answers show that clear warnings were documented but not answered — and a baby was seriously injured as a result — the negligence lies in that failure to act on what the record was already showing. When the answers show early recognition, prompt treatment of severe-range pressures, appropriate labs and monitoring, and delivery at the right time, preeclampsia reflects the hard reality of a difficult pregnancy rather than a failure of care.

What a Trained Reader Looks For in the Records

Preeclampsia cases are unusual in that the warning is often written down over weeks, across the prenatal chart, before it ever becomes an emergency. That makes them turn on reading the whole record together rather than any single dramatic moment. When Herb Borroto, M.D., J.D., the firm’s Medical-Legal Expert, reviews a preeclampsia file, the pieces are cross-checked against one another:

• The prenatal blood-pressure trend. Every reading in sequence — when the numbers began to climb, when they first crossed 140/90, and when (or whether) the plan changed in response.
• The severe-range readings against the clock. When a pressure first hit 160/110, and how many minutes passed before a first-line medication was actually given.
• The labs against the symptoms. The platelet count, liver enzymes, and kidney tests over time — and whether a report of upper-abdominal pain or feeling unwell triggered the testing that could reveal HELLP.
• The delivery decision against the guidelines. Whether severe features were present, and whether delivery followed at the point the standard describes or was allowed to drift.
• The baby’s course. The growth scans, the labor tracing, the cord blood gases, and whether a baby with signs of injury was evaluated for cooling in time.

Alex Alvarez, the firm’s Managing Partner and a Board Certified Civil Trial Lawyer, presents these cases the way the medicine reads them: preeclampsia rarely strikes without warning — the warning is usually in the chart, sometimes for weeks. A timeline built reading by reading and lab by lab from the medical record shows what the care team knew, and when, far more reliably than anyone’s later recollection of how the pregnancy felt.

If Your Baby Was Injured After a Pregnancy Complicated by High Blood Pressure

If you had preeclampsia, HELLP syndrome, or eclampsia and your baby was later diagnosed with growth restriction, a brain injury, cerebral palsy, or hypoxic-ischemic encephalopathy — or if you were sent home feeling unwell and cannot understand why your worsening symptoms were not taken more seriously — the prenatal, labor, delivery, and newborn records will hold most of the answer. A free, confidential case review can help you understand whether the care around your pregnancy met the standard the situation required, and whether the deadlines in your state are still open — which, for injuries to a child, often run far longer than parents expect. See our related guides to fetal growth restriction, placental abruption, HIE and cooling therapy, and the birth injury statute of limitations.

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Sources

• American College of Obstetricians and Gynecologists (ACOG) — “Gestational Hypertension and Preeclampsia,” Practice Bulletin No. 222, on the diagnostic criteria, severe features, use of magnesium sulfate, and delivery-timing recommendations. acog.org
• American College of Obstetricians and Gynecologists (ACOG) — “Emergent Therapy for Acute-Onset, Severe Hypertension During Pregnancy and the Postpartum Period,” Committee Opinion No. 767, on treating persistent severe-range blood pressure within 30–60 minutes. acog.org
• U.S. Preventive Services Task Force (USPSTF) — “Aspirin Use to Prevent Preeclampsia and Related Morbidity and Mortality: Preventive Medication” (2021), on low-dose aspirin for women at high risk. uspreventiveservicestaskforce.org
• Rimsha Ali, et al. “HELLP Syndrome.” StatPearls, National Library of Medicine (NCBI Bookshelf) — a peer-reviewed reference on the definition, the ways HELLP can present with minimal hypertension, and its complications. ncbi.nlm.nih.gov
• National Library of Medicine (MedlinePlus) — “Preeclampsia” and “Postpartum preeclampsia,” plain-language overviews of symptoms, risk factors, and the postpartum window. medlineplus.gov