Recurrent Miscarriage: Causes & Care

Recurrent miscarriage, defined as two or more consecutive pregnancy losses, can be a heartbreaking experience. If you are facing recurrent miscarriage in Chennai, it's important to understand the potential causes, available testing, and treatment options. As a fertility specialist practising across multiple locations in Chennai, I understand the emotional and physical toll it can take, and I'm here to guide you through the process.

What Is Recurrent Miscarriage?

Recurrent miscarriage, also known as recurrent pregnancy loss (RPL), is defined as two or more clinical pregnancies ending in spontaneous miscarriage before 20 weeks of gestation. According to the ESHRE guidelines, RPL is the spontaneous loss of two or more pregnancies from conception until 24 weeks of gestation. It is distinct from infertility, which is defined as the inability to conceive after one year of unprotected intercourse. Recurrent miscarriage affects approximately 1-2% of women trying to conceive, but the emotional and psychological impact can be significant. It's important to remember that experiencing one miscarriage is relatively common, affecting about 10-20% of known pregnancies. However, the likelihood of a subsequent miscarriage increases after each loss. Fewer than 5% of women experience two consecutive miscarriages, and only 1% experience three or more.

In my clinical experience, patients often feel isolated and blame themselves after experiencing recurrent miscarriage. It's crucial to understand that in many cases, there is an underlying medical reason for the losses, and with proper investigation and treatment, the chances of a successful pregnancy can be significantly improved. It is also important to note that the definition of recurrent miscarriage has evolved over time. Historically, it was defined as three or more consecutive miscarriages. However, current guidelines, including those from the American Society for Reproductive Medicine (ASRM), now recommend evaluation after two losses due to the increasing availability of diagnostic tools and treatment options. Seeking early evaluation and support from a fertility specialist is key to navigating this challenging experience.

Causes and Risk Factors of Recurrent Miscarriage

The causes of recurrent miscarriage are diverse and can be complex, often involving a combination of factors. Identifying the underlying cause is crucial for developing an effective treatment plan.

• Genetic Factors: Chromosomal abnormalities in the embryo are a leading cause of miscarriage, accounting for about 50-70% of first-trimester losses. These abnormalities can arise spontaneously or be inherited from one or both parents. Karyotype analysis (chromosome testing) of both parents is essential to identify balanced translocations or inversions that may increase the risk of miscarriage.
• Uterine Abnormalities: Structural problems with the uterus, such as uterine septum, bicornuate uterus, or fibroids, can interfere with implantation and pregnancy development. Hysteroscopy or saline infusion sonography (SIS) can help identify these abnormalities.
• Hormonal Imbalances: Hormonal disorders, such as polycystic ovary syndrome (PCOS), thyroid dysfunction (both hypothyroidism and hyperthyroidism), and luteal phase deficiency, can disrupt the delicate hormonal balance required for a successful pregnancy.
• Immunological Factors: Autoimmune disorders, such as antiphospholipid syndrome (APS), can cause blood clots in the placenta, leading to miscarriage. Testing for antiphospholipid antibodies (lupus anticoagulant, anticardiolipin antibodies, and anti-beta2 glycoprotein I antibodies) is recommended.
• Thrombophilias: Inherited or acquired thrombophilias (blood clotting disorders) can increase the risk of blood clots in the placenta, leading to miscarriage. Common thrombophilias include Factor V Leiden mutation, prothrombin G20210A mutation, and protein C and protein S deficiencies.
• Lifestyle Factors: While less directly causative, lifestyle factors such as smoking, excessive alcohol consumption, obesity (BMI > 30), and uncontrolled diabetes can increase the risk of miscarriage.

It's important to note that in up to 50% of cases of recurrent miscarriage, no specific cause can be identified, which is referred to as unexplained recurrent miscarriage. Even in these cases, there are still treatment options available that can improve the chances of a successful pregnancy. Research suggests that imbalances in T and B cell subtypes, as well as natural killer (NK) cell activity, can play a role in unexplained RPL.

Signs and Symptoms of Recurrent Miscarriage

The primary symptom of recurrent miscarriage is, of course, experiencing multiple pregnancy losses. However, it's important to recognize the signs and symptoms that may indicate a potential miscarriage in progress. These symptoms can vary from woman to woman, and not all women will experience all of them.

• Vaginal Bleeding: This is the most common symptom of a miscarriage. The bleeding can range from light spotting to heavy bleeding with clots. It's important to note that some spotting can be normal in early pregnancy, but any bleeding should be evaluated by a doctor.
• Abdominal Pain or Cramping: Pain or cramping in the lower abdomen, which can range from mild to severe, is another common symptom. The pain may be constant or intermittent.
• Decrease in Pregnancy Symptoms: A sudden decrease in pregnancy symptoms, such as nausea, breast tenderness, or fatigue, can also be a sign of a potential miscarriage.
• Passage of Tissue: Passing tissue or clots from the vagina is a clear sign of miscarriage.
• Back Pain: Lower back pain can sometimes accompany other symptoms of miscarriage.

It's crucial to seek immediate medical attention if you experience any of these symptoms, especially if you have a history of recurrent miscarriage. Early evaluation can help determine if a miscarriage is occurring and whether any interventions are possible. In some cases, progesterone supplementation may be recommended to support the pregnancy. According to NICE guidelines, vaginal micronized progesterone 400 mg twice daily should be considered for women with an intrauterine pregnancy confirmed by scan, if they have vaginal bleeding and have previously had a miscarriage. If a fetal heartbeat is confirmed, progesterone should be continued until 16 completed weeks of pregnancy.

How Recurrent Miscarriage Is Diagnosed

Diagnosing the underlying cause of recurrent miscarriage involves a comprehensive evaluation, including a detailed medical history, physical examination, and a series of diagnostic tests. As a fertility specialist in Chennai, I tailor the diagnostic approach to each patient's individual circumstances.

• Medical History: A thorough medical history is essential, including information about previous pregnancies, miscarriages, medical conditions, medications, and lifestyle factors.
• Physical Examination: A physical examination, including a pelvic exam, can help identify any obvious abnormalities.
• Karyotype Analysis: Chromosome testing (karyotype analysis) is recommended for both parents to identify balanced translocations or inversions that may increase the risk of miscarriage.
• Uterine Evaluation: Imaging techniques, such as transvaginal ultrasound, saline infusion sonography (SIS), or hysteroscopy, are used to evaluate the uterus for structural abnormalities, such as uterine septum, bicornuate uterus, or fibroids.
• Hormonal Evaluation: Blood tests are performed to assess hormone levels, including thyroid-stimulating hormone (TSH), prolactin, and luteal progesterone.
• Immunological Testing: Blood tests are done to check for antiphospholipid antibodies (lupus anticoagulant, anticardiolipin antibodies, and anti-beta2 glycoprotein I antibodies), which are associated with antiphospholipid syndrome (APS).
• Thrombophilia Testing: Blood tests are performed to screen for inherited or acquired thrombophilias (blood clotting disorders), such as Factor V Leiden mutation, prothrombin G20210A mutation, and protein C and protein S deficiencies.
• Semen Analysis: Semen analysis may be recommended to assess sperm quality and identify any abnormalities that may contribute to miscarriage. Meta-analyses have shown that high sperm DNA damage is strongly associated with increased risk of sporadic miscarriage and that increased levels of SDF are significantly associated with unexplained RM.

The cost of these tests in Chennai can vary depending on the clinic and the specific tests performed. Generally, karyotype analysis can cost between INR 5,000 to INR 10,000 per person, while uterine evaluation with SIS or hysteroscopy can range from INR 8,000 to INR 15,000. Hormonal and immunological testing can cost between INR 3,000 to INR 8,000, depending on the number of tests ordered.

Treatment Options for Recurrent Miscarriage in Chennai

Treatment options for recurrent miscarriage depend on the underlying cause identified during the diagnostic evaluation. As a fertility specialist, I develop a personalized treatment plan for each patient based on their individual needs and circumstances.

• Genetic Counseling and IVF with PGT: If chromosomal abnormalities are identified in either parent, genetic counseling is recommended to discuss the risks and options for future pregnancies. In vitro fertilization (IVF) with preimplantation genetic testing (PGT) may be recommended to test each embryo for specific genetic and chromosomal issues before implantation.
• Surgical Correction: Uterine abnormalities, such as uterine septum or fibroids, can be surgically corrected via laparoscopy or hysteroscopy.
• Hormone Therapy: Hormonal imbalances, such as thyroid dysfunction or luteal phase deficiency, can be treated with medication to restore hormonal balance. For women with RPL associated with the MTHFR gene mutation and/or hyperhomocysteinemia, the administration of L-methylfolate, vitamin B6, and vitamin B12 is recommended.
• Anticoagulant Therapy: Antiphospholipid syndrome (APS) is treated with anticoagulant therapy, such as low-dose aspirin and heparin, to prevent blood clots in the placenta. Meta-analysis has shown a reduction in miscarriage and increase in live birth with the combined use of low-dose aspirin and heparin compared with placebo in women with antiphospholipid syndrome and recurrent miscarriage.
• Lifestyle Modifications: Lifestyle modifications, such as maintaining a healthy BMI, quitting smoking, limiting alcohol consumption, and managing stress, are recommended to improve overall health and reduce the risk of miscarriage.

Here's a comparison of common treatment options: