I'm scared. How common is HELLP syndrome?

HELLP syndrome is rare, affecting approximately 0.5 to 0.9 percent of all pregnancies and about 10 to 20 percent of pregnancies complicated by severe preeclampsia. While the condition is serious, its rarity means that the overwhelming majority of pregnant women will never experience it. The reason we educate patients about HELLP is that early recognition of symptoms dramatically improves outcomes for both mother and baby [1].

What does HELLP actually stand for?

HELLP is an acronym that describes the three laboratory findings that define the syndrome. H stands for Hemolysis (the breakdown of red blood cells). EL stands for Elevated Liver enzymes (indicating liver inflammation or damage). LP stands for Low Platelet count (platelets are the cells that help your blood clot). These three processes happening together create a dangerous cascade that requires immediate medical intervention [1].

Can HELLP syndrome happen even if my blood pressure has been normal?

Yes. Up to 15 percent of women who develop HELLP syndrome have normal blood pressure and no protein in their urine at the time of diagnosis. The absence of traditional preeclampsia signs does not rule out HELLP. If you have severe upper abdominal pain, persistent nausea, or unusual fatigue in the third trimester, your provider needs to run blood work regardless of your blood pressure reading [1][2].

Does insurance cover the emergency care and extended hospital stay for HELLP?

Yes. HELLP syndrome is treated as a medical emergency, and all associated care, including emergency hospitalization, lab work, magnesium sulfate administration, blood transfusions if needed, and NICU care for the baby, is covered by insurance as medically necessary treatment. Postpartum ICU stays for maternal monitoring are also covered.

I had severe nausea and pain under my right ribs but thought it was just pregnancy heartburn. How do I tell the difference?

Heartburn is extremely common in pregnancy and typically presents as a burning sensation behind the breastbone that worsens after eating or lying down. The pain associated with HELLP syndrome is different: it is usually located in the upper right abdomen, below the ribs, and may feel like a deep ache, pressure, or stabbing pain. It often comes with nausea or vomiting and does not improve with antacids. If you have upper abdominal pain that is severe, persistent, or accompanied by headache, visual changes, or general malaise, call your MomDoc provider or go to the emergency room immediately [2].

Can HELLP happen after I deliver?

Yes. About 30 percent of HELLP syndrome cases develop in the postpartum period, typically within 48 to 72 hours after delivery. Some women feel fine immediately after giving birth and then rapidly deteriorate. Warning signs include severe upper abdominal pain, headache, nausea, vomiting, and swelling that develops after delivery. Your MomDoc team monitors your lab values closely for 24 to 48 hours after delivery and checks on you at your early postpartum visit [1].

HELLP Syndrome Signs & Emergency Care

When Heartburn and Nausea Turn Out to Be Something Far More Serious

She thought it was heartburn. The kind of relentless, stabbing discomfort under the right ribs that pregnancy books warn you about. She took antacids. She ate smaller meals. She propped herself up on pillows. When the nausea got worse and she started feeling "just not right," she almost did not call. After all, nausea and indigestion in the third trimester are supposed to be normal.

They are normal. Except when they are not.

HELLP syndrome is one of the most serious complications in obstetrics, and its most insidious quality is how easily its symptoms blend into the everyday discomforts of late pregnancy. Upper abdominal pain gets dismissed as heartburn. Nausea gets chalked up to a big meal. Fatigue gets blamed on being nine months pregnant. Meanwhile, a dangerous cascade is unfolding in the liver and bloodstream.

We share this not to frighten you, but to arm you with the knowledge that could save your life: HELLP syndrome is treatable and survivable when caught early. Knowing the warning signs is the single most valuable thing you can do.

What Is HELLP Syndrome?

HELLP is an acronym for three laboratory findings that occur together [1]:

H = Hemolysis: red blood cells are breaking down faster than the body can replace them
EL = Elevated Liver enzymes: the liver is inflamed and struggling, often with enzyme levels more than twice the normal upper limit
LP = Low Platelets: the platelet count drops below 100,000/mm3, impairing the blood's ability to clot

HELLP syndrome is classified as a variant of severe preeclampsia, though it can also occur in women who do not meet the traditional criteria for preeclampsia (blood pressure may be normal and there may be no protein in the urine) [2]. It most commonly develops in the third trimester but can occur earlier or even postpartum.

The condition affects approximately 0.5 to 0.9 percent of all pregnancies and 10 to 20 percent of pregnancies complicated by severe preeclampsia [2].

Why HELLP Gets Missed

"I thought it was heartburn and nausea until they rushed me to delivery." We hear some version of this story regularly. HELLP syndrome is uniquely deceptive because its early symptoms mimic conditions that every pregnant woman experiences. The upper right abdominal pain is easily mistaken for reflux. The nausea feels like a bad day. The fatigue seems par for the course in late pregnancy. By the time the symptoms feel truly alarming, the condition may have already progressed.

"I did not have high blood pressure, so nobody was looking for it." Up to 15 percent of HELLP cases present without hypertension. Another significant percentage present without proteinuria. If your provider is screening only for classic preeclampsia signs, HELLP can slip through the cracks. At MomDoc, we run blood work when the clinical picture warrants it, regardless of whether your blood pressure is normal.

"The speed was terrifying." HELLP can progress from "feeling off" to "emergency delivery" in a matter of hours. Women describe going from a normal afternoon to a labor and delivery bed with IV magnesium, multiple blood draws, and a surgical team assembling in what feels like the blink of an eye. That rapid escalation is frightening, but it is also what keeps mothers and babies safe.

"Nobody warned me it could happen after delivery." About 30 percent of HELLP cases develop or worsen postpartum, typically within 48 to 72 hours of delivery [1]. Women who felt fine during delivery can deteriorate rapidly in the days following birth. Postpartum HELLP is real, and your monitoring should not stop just because the baby has arrived.

Who Is at Risk?

HELLP syndrome risk factors overlap significantly with preeclampsia risk factors [1][2]:

Prior history of preeclampsia or HELLP syndrome
Chronic hypertension
Maternal age over 35
Multiparity (HELLP occurs more often in women who have had previous pregnancies, unlike preeclampsia which favors first pregnancies)
Obesity (BMI over 30)
Autoimmune conditions (antiphospholipid syndrome, lupus)
History of liver disease

However, HELLP can also occur in women with no identifiable risk factors, which is why symptom awareness is so valuable.

Warning Signs: When to Call

The challenge with HELLP syndrome is distinguishing its symptoms from normal third-trimester discomfort. Here is a framework:

Symptoms That Warrant Immediate Evaluation

Upper right abdominal pain that is persistent, severe, or does not improve with antacids
Nausea and vomiting that develops new in the third trimester or suddenly worsens
Severe headache that does not respond to acetaminophen
Visual changes (blurring, flashing lights, double vision)
General malaise: a profound sense of "something is wrong" that goes beyond typical pregnancy tiredness
Sudden swelling, particularly in the face and hands
Easy bruising or bleeding from gums (signs of low platelets)
Shoulder pain (can indicate liver capsule distension or diaphragm irritation from internal bleeding)

The "Trust Your Gut" Rule

If you are in your third trimester and you feel significantly worse than you did yesterday with no obvious explanation, call your MomDoc provider. We will run blood work. If it comes back normal, everyone feels reassured. If it does not, we may have just caught something life-saving.

How We Diagnose HELLP

Diagnosis is based on laboratory findings, not symptoms alone [1][2]:

Test	HELLP Criteria
Hemolloysis markers	Abnormal peripheral blood smear, elevated LDH (>600 IU/L), elevated bilirubin
Liver enzymes	AST or ALT more than twice the upper limit of normal
Platelet count	Below 100,000/mm3

Your provider will also check:

Complete blood count (CBC)
Coagulation studies (PT, PTT, fibrinogen)
Kidney function (creatinine, BUN)
Uric acid

HELLP can be classified as complete (all three criteria met) or partial/incomplete (only one or two criteria met). Partial HELLP can still progress rapidly to complete HELLP.

Treatment: Delivery Is the Cure

The definitive treatment for HELLP syndrome is delivery of the baby and placenta [1]. The condition is caused by the pregnancy itself, and it resolves (usually within 24 to 72 hours) once the placenta is delivered.

Stabilization Before Delivery

Before delivery, your medical team will focus on:

Magnesium sulfate to prevent seizures (eclampsia)
Blood pressure management with IV antihypertensive medications
Corticosteroids (betamethasone) if the baby is less than 34 weeks, to accelerate fetal lung maturity
Platelet transfusion if counts are critically low (below 20,000) and delivery is imminent
Strict fluid monitoring to prevent pulmonary edema

Delivery Timing

At 34 weeks or later: delivery is recommended after maternal stabilization [1]
Before 34 weeks: corticosteroids are given, and delivery is timed based on maternal and fetal condition
If the mother or fetus is unstable at any gestational age: delivery proceeds immediately after stabilization, regardless of how premature the baby may be

Postpartum Monitoring

The danger does not end at delivery. HELLP can worsen in the 24 to 72 hours after birth [1].

Serial lab work every 6 to 12 hours for at least 24 to 48 hours postpartum
Continued magnesium sulfate for 24 hours after delivery
Close blood pressure monitoring
Fluid balance tracking to prevent pulmonary edema
Postpartum corticosteroids may be considered if lab values do not improve

Lab values typically begin to normalize within 24 to 48 hours after delivery. If they are not improving by 72 hours, your care team will investigate further.

Long-Term Considerations

Future Pregnancies

Women who have had HELLP syndrome have an increased risk of recurrence in future pregnancies (approximately 2 to 19 percent depending on the study). Your MomDoc provider will classify your next pregnancy as high-risk and implement early and frequent monitoring, including low-dose aspirin prophylaxis starting before 16 weeks.

Cardiovascular Health

Like preeclampsia, HELLP syndrome is associated with an increased long-term risk of cardiovascular disease, including hypertension, heart disease, and stroke. Your MomDoc provider will recommend regular blood pressure monitoring and cardiovascular screening as part of your ongoing health care.

Common Misconceptions

Myth: "HELLP syndrome only happens with high blood pressure."Fact: Up to 15 percent of women who develop HELLP syndrome have normal blood pressure at the time of diagnosis. The absence of hypertension does not rule out HELLP. If you have severe upper abdominal pain, nausea, or a sense that something is profoundly wrong in late pregnancy, your provider should order blood work regardless of your blood pressure reading [1][2].Myth: "HELLP is just severe preeclampsia with a different name."Fact: While HELLP is related to preeclampsia and often overlaps with it, HELLP involves specific laboratory findings (hemolysis, elevated liver enzymes, low platelets) that distinguish it as a distinct clinical entity. Some researchers believe it may involve different pathophysiological mechanisms. The distinction matters because treatment priorities (particularly platelet monitoring and liver function) differ from standard preeclampsia management [2].Myth: "If I had normal labs at my last prenatal visit, I'm in the clear."Fact: HELLP can develop within days of a normal set of lab results. The condition can progress rapidly. Lab values that are normal on Monday can be dangerously abnormal by Thursday. Symptom awareness is your most powerful screening tool between appointments.

The MomDoc Approach

At MomDoc, HELLP syndrome awareness is woven into our prenatal education. We teach every patient the warning signs, not because we want you to be anxious, but because we want you to trust your body and call us when something feels wrong.

When HELLP is suspected, we act with urgency. Lab results are expedited, maternal-fetal medicine specialists are consulted, and our hospital partners at Banner are alerted. We do not wait for a complete picture when the clinical suspicion is high.

After delivery, our postpartum monitoring protocol for HELLP patients is intensive. You will not be discharged until your lab values are trending in the right direction and your clinical team is confident in your recovery trajectory.

Appointment Types

Routine prenatal visits (blood pressure and symptom screening at every visit)
Urgent evaluation for new upper abdominal pain, headache, visual changes, or malaise
Emergency labor and delivery admission when HELLP is diagnosed
Postpartum ICU or enhanced recovery monitoring (serial labs every 6-12 hours)
Early postpartum follow-up (within 72 hours of discharge, then 7-10 days)
Preconception counseling for future pregnancies after HELLP

Your Instincts Are a Diagnostic Tool

Of all the pregnancy complications we manage, HELLP syndrome is the one where patient awareness makes the greatest difference. The woman who calls because "something just feels off" often gets diagnosed before the woman who dismisses her symptoms as heartburn and waits.

You know your body better than any lab test or blood pressure cuff. If your third trimester suddenly feels harder than it should, if the discomfort under your ribs will not let up, if you feel a deep sense that something has changed, pick up the phone.

We would rather run a blood panel that comes back perfectly normal than miss the one that does not.