Autoimmune Causes of Recurrent Miscarriage

• September 24, 2026September 24, 2026
• 0

A miscarriage can leave behind more than grief; it can leave behind a question with no clear answer: why did this happen? With recurrent miscarriage, that question doesn’t fade. It follows you into the next pregnancy, and the one after, making you wonder whether something was quietly standing in the way all along.

For many women, the answer lies in autoimmune disease, where the body that was meant to protect and welcome the baby starts fighting it. This blog covers how autoimmune disorders connect to recurrent miscarriage, the conditions most often responsible, the tests that catch them, and the treatment that follows, so you can move from wondering to knowing, and give your baby the chance to keep growing, until you finally get to hold it in your arms.

Autoimmune Disease and Recurrent Miscarriage: Where Do They Connect? 

Miscarriage can happen for many reasons: problems with the embryo, the uterus, hormones, or other health conditions. When it happens twice or more, doctors call it recurrent miscarriage, or recurrent pregnancy loss, and the question underneath stays the same: is something repeatedly standing in the way?

One possible answer is autoimmune disease. Your immune system is meant to be the body’s defence force, recognising what doesn’t belong and fighting it off. In autoimmune disease, that system misfires, treating the body’s own healthy cells and tissues as a threat.

Pregnancy depends on this system working correctly. When the misdirected response targets the placenta, its blood vessels, or the processes that let a pregnancy grow, the risk of miscarriage rises.

Recurrent Miscarriage Autoimmune Causes

The autoimmune disorders most often linked to recurrent miscarriage are antiphospholipid syndrome (APS), autoimmune thyroid disease, and systemic lupus erythematosus (SLE), each affecting pregnancy differently.  

Antiphospholipid syndrome (APS) and recurrent miscarriage 

• Abnormal antibodies interfere with normal blood clotting
• Blood clots more easily than it should
• Clots in placental blood vessels reduce blood flow, oxygen and nutrition to the baby

Autoimmune thyroid disease

• Thyroid hormone is essential for a healthy pregnancy
• Abnormal antibodies attack the thyroid gland, lowering hormone production
• Low levels can negatively affect the pregnancy

Systemic lupus erythematosus (SLE)

• The immune system attacks the body’s own tissues, causing inflammation
• This affects organs and blood vessels, raising the risk of pregnancy complications, including miscarriage

Why these can happen isn’t always clear. Genetics, past infections, and hormonal shifts, especially during pregnancy, are all thought to play a role, though for many women, no single trigger is ever pinned down, and the first real clue often comes only after a loss. . 

Autoimmune Miscarriage Symptoms

There’s no single symptom that confirms an autoimmune cause. Most women only notice the miscarriage itself; some also have signs of the underlying condition.

• Repeated miscarriages: Two or more losses may be the main sign further evaluation is needed
• Vaginal bleeding: Light spotting or heavier bleeding during a miscarriage
• Abdominal or pelvic cramps: Often accompanies pregnancy loss
• Signs of the underlying condition: Fatigue, joint pain, swelling, or other organ-specific symptoms

“A lot of times, there’s no pain, no obvious sign, nothing that tells a woman something is wrong until she’s already lost a pregnancy. That’s why loss history matters more than symptoms here. Two or more losses, and we test,” says Dr. Aruna Kalra, Senior Gynaecologist & Obstetrician, Director, CK Birla Hospital, Gurgaon.

Autoimmune Tests for Recurrent Miscarriage

Doctors use blood tests, in line with NICE and ACOG guidelines, to check for the conditions most likely to affect pregnancy, a standard blood draw with no fasting or special preparation needed.

Test	What it checks for	Why it is done
Antiphospholipid antibody tests	Lupus anticoagulant, anticardiolipin, and anti-β2 glycoprotein I antibodies	These antibodies can cause abnormal blood clotting. If positive, the test is repeated after at least 12 weeks to confirm they persist.
TSH	Thyroid hormone levels	Identifies thyroid problems linked to pregnancy loss.
TPO antibodies	Thyroid autoimmunity	Identifies autoimmune thyroid disease.
ANA test	Autoimmune antibodies	May be considered with joint pain or unusual rashes to screen for SLE-type immune reactions.
Coeliac screening	Gluten-related immune reaction	May be considered because it can affect nutrient absorption.

 

Autoimmune-Related Recurrent Miscarriage Treatment

Treatment depends on the autoimmune condition identified:

Condition	Treatment Approach	How it helps
Antiphospholipid syndrome (APS)	Blood-thinning medication, as prescribed by your doctor	Reduces abnormal clot formation, supports placental blood flow
Autoimmune thyroid disease with abnormal thyroid function	Thyroid hormone replacement medication	Restores healthy thyroid hormone levels through pregnancy

 

“Medications can help, but it’s important to get the dose and timing right. I’ve seen women start these medicines on their own simply because they’re easily available, without realising that when you take them and how you take them matters too,” says Dr. Aruna Kalra. “These medicines should always be taken under a doctor’s guidance, rather than self-managed.”

Can You Have a Healthy Pregnancy After Recurrent Miscarriage?

Yes. Many women with recurrent miscarriage go on to have a healthy pregnancy once the underlying cause is identified and managed.

• APS diagnosed: blood-thinning treatment can improve outcomes
• Thyroid dysfunction: treating it before and during pregnancy supports the pregnancy
• No clear cause found: your doctor can still monitor closely and manage other risk factor

In one study following women with recurrent miscarriage after diagnosis and treatment, over 8 in 10 who conceived again went on to have a live birth. Individual outcomes vary, A history of recurrent miscarriage doesn’t mean a future pregnancy has to end the same way.

When Should You See a Doctor for Recurrent Miscarriage?

See an obstetrician-gynaecologist if you have:

• Two or more miscarriages, consecutive or not
• A previous miscarriage alongside a known autoimmune condition
• A positive antiphospholipid antibody test
• A history of miscarriage and are planning another pregnancy

Seek immediate care for heavy bleeding, severe abdominal pain, or dizziness during a current pregnancy, don’t wait to schedule these. Dr. Aruna Kalra brings over 25 years of experience in diagnosing and managing recurrent pregnancy loss, guiding women through personalised evaluation and care planning.

Final Thoughts

Recurrent miscarriage is frightening, especially without a clear reason why, but it’s not always unexplained – where autoimmune conditions are the cause, they can be identified through the right tests and managed with targeted treatment. With proper diagnosis and care, many women go on to have a healthy, successful pregnancy.

FAQs

1. Is recurrent miscarriage always caused by an autoimmune condition?
   No. Autoimmune disease is one possible cause among several, including chromosomal, structural, and hormonal factors. Testing helps rule it in or out.
2. How many miscarriages count as “recurrent miscarriage”?
   Most guidelines define it as two or more consecutive pregnancy losses, though some doctors begin testing after just two, especially past age 35.
3. Can autoimmune-related miscarriage be prevented before I even get pregnant?
   If a condition like APS or thyroid disease is caught beforehand, starting treatment before conception often improves the chances of carrying to term.
4. Does having lupus (SLE) mean I’ll definitely miscarry?
   No. Many women with SLE go on to have healthy pregnancies, especially when the disease is well-controlled before conception.
5. What’s the most common cause of recurrent miscarriage in the first trimester?
   Chromosomal abnormalities are the most common cause of a single miscarriage. For recurrent losses, causes vary, APS is among the most common treatable ones.