Why Does the Immune System Cause Pregnancy Loss?

Home > Blog > Why Does the Immune System Cause Pregnancy Loss?

Why Can the Immune System Reject Pregnancy?

Why Can the Immune System Reject Pregnancy?

By SaimaJaved

|  January 13, 2026

Pregnancy is a remarkable biological process where a mother’s immune system must accept and protect a genetically different fetus. When this delicate balance is disturbed, it can lead to immune-related labor loss. Many women repeatedly ask, “Why show Understanding Immune-Related Pregnancy Loss Cause?”—especially after recurrent miscarriages with no obvious explanation.

According to the best lady gynecologist in Kolkata, immune-related pregnancy loss is one of the most underdiagnosed yet treatable causes of recurrent miscarriage. Dr Saima Javed, known for her expertise in complex and high-risk pregnancies, emphasizes that identifying immune causes early can dramatically improve live birth outcomes.

This in-depth guide explains the causes, diagnosis, treatment, and prevention of immune-related pregnancy loss in a clear, patient-friendly way.

Immune-related pregnancy loss occurs when the mother’s immune system mistakenly attacks the developing embryo or interferes with placental development, leading to miscarriage—often repeatedly.

Key concept:

The fetus is genetically half foreign, and gravida succeeds only when the immune system develops tolerance.

The best lady gynecologist in Kolkata focuses on restoring this immune tolerance to sustain a healthy pregnancy.

best lady gynecologist in Kolkata,Pregnancy
Why Does Prostate Cancer Act Differently in Every Man

Immune-related pregnancy loss occurs when the mother’s immune system mistakenly attacks the developing embryo or interferes with placental development, leading to miscarriage—often repeatedly.

Key concept:

The fetus is genetically half foreign, and labor succeeds only when the immune system develops tolerance.

The best lady gynecologist in Kolkata focuses on restoring this immune tolerance to sustain a healthy pregnancy.

How the Immune System Normally Supports Pregnancy?

In a healthy pregnancy:

  • The immune system shifts from “attack mode” to “tolerance mode”
  • Specialized immune cells protect the placenta
  • Inflammation is carefully controlled

When this process fails, immune-related pregnancy loss may occur—an area where the best lady gynecologist in Kolkata plays a critical diagnostic role.

1. Antiphospholipid Antibody Syndrome (APS)

APS is one of the most common immune causes of miscarriage.

How it causes loss:

  • Antibodies increase blood clotting
  • Placental blood flow is reduced
  • Fetal growth stops

APS is a key answer to why show Understanding Immune-Related Pregnancy Loss Cause?

2. Autoimmune Disorders

Conditions like:

  • Lupus (SLE)
  • Rheumatoid arthritis
  • Autoimmune thyroid disease

These disorders cause the immune system to attack healthy tissues, including the placenta.

3. Natural Killer (NK) Cell Overactivity

NK cells normally help implantation. When overactive:

  • They attack trophoblast cells
  • Implantation fails
  • Early miscarriage occurs

The best lady gynecologist in Kolkata often investigates NK cell activity in recurrent pregnancy loss.

4. Alloimmune Pregnancy Loss

This occurs when the mother’s immune system fails to recognize the fetus as “safe.”

Result:

  • No protective antibodies develop
  • Placental attachment becomes weak

5. Inflammatory Immune Response

Excessive inflammation:

  • Damages placental tissue
  • Alters hormone signaling
  • Leads to pregnancy failure

Immune Causes and Their Effects on Pregnancy

Immune CauseMechanismPregnancy Impact
APSBlood clot formationRecurrent miscarriage
Autoimmune diseasePlacental attackGrowth restriction
NK cell excessImplantation failureEarly loss
Alloimmune issueLack of toleranceRepeated loss
InflammationPlacental damageMiscarriage

This table summarizes Understanding Immune-Related Pregnancy Loss Cause clearly.

Women with:

  • Recurrent miscarriages (2 or more)
  • IVF failures
  • Autoimmune disorders
  • Unexplained infertility
  • Late pregnancy losses

Early consultation with the best lady obstetrician in Kolkata can prevent repeated heartbreak.

Symptoms and Warning Signs

Immune-related pregnancy loss often has no obvious symptoms.

Possible indicators include:

  • Multiple early miscarriages
  • Loss after heartbeat detection
  • Placental complications
  • Pre-eclampsia or IUGR history

This silent nature explains why understanding Immune-Related Pregnancy Loss Cause? is so important.

Diagnosis: How Immune Pregnancy Loss Is Identified?

  • Antiphospholipid antibody panel
  • ANA and autoimmune markers
  • NK cell activity tests
  • Thrombophilia screening
  • Thyroid antibodies

Dr Saima Javed, a trusted name among the best lady gynecologists in Kolkata, customizes testing based on patient history—avoiding unnecessary investigations.

1. Blood Thinners (Heparin & Aspirin)

Used in APS to prevent placental clots.

2. Immunomodulatory Therapy

  • Steroids
  • IVIG (selected cases)
  • Hydroxychloroquine

3. Hormonal & Supportive Therapy

  • Progesterone support
  • Thyroid regulation

4. Lifestyle & Inflammation Control

  • Anti-inflammatory diet
  • Stress reduction
  • Adequate sleep

Under expert care, success rates significantly improve—reinforcing the role of the best lady gynecologist in Kolkata.

Yes, in many cases.

Prevention strategies:

  • Pre-pregnancy immune evaluation
  • Early treatment initiation
  • Close pregnancy monitoring
  • Multidisciplinary care

This proactive approach answers the concern: why show Understanding Immune-Related Pregnancy Loss Cause?

Emotional Impact and Psychological Support

Repeated pregnancy loss can cause:

  • Anxiety
  • Depression
  • Fear of future pregnancies

Dr Saima Javed emphasizes compassionate counseling as an essential part of immune pregnancy care—aligning with holistic, patient-first treatment.

Immune-related pregnancy loss occurs when the mother’s immune system attacks the placenta or fetus due to autoimmune disorders, clotting antibodies, or immune intolerance, leading to miscarriage.

Why Choose Dr Saima Javed?

Women trust Dr Saima Javed because she offers:

  • Extensive experience in recurrent pregnancy loss
  • Evidence-based immune evaluation
  • Personalized treatment plans
  • Compassionate, ethical care

Her clinical expertise firmly establishes her as one of the best lady gynecologists in Kolkata.

Conclusion

Understanding immune-related pregnancy loss cause is the key to breaking the cycle of repeated miscarriages. What once seemed unexplained is now increasingly treatable with modern diagnostics and expert care.

By consulting the best lady gynecologist in Bowbazar, Dr Saima Javed, women can move from uncertainty to hope—with science, compassion, and personalized treatment guiding every step.

Because every pregnancy deserves the best chance to thrive.

FAQs 

Why does the immune system reject pregnancy?

Due to autoimmune disorders, clotting antibodies, or immune intolerance to the fetus.

Can immune pregnancy loss be treated?

Yes. With proper diagnosis and treatment, many women achieve successful pregnancies.

Who is the best lady gynecologist in Kolkata for recurrent miscarriage?

Dr Saima Javed is widely trusted for managing immune-related and high-risk pregnancies.

Are immune tests necessary after one miscarriage?

Usually after recurrent losses, unless there are risk factors.

IUI (Intrauterine Insemination) alone does not treat immune-related pregnancy loss, because the problem is not fertilization, but how the mother’s immune system reacts after implantation

Need to see a gynaecologist?

We’ve made it simple for you to schedule an appointment right
away via Whatsapp.