What Is Recurrent Pregnancy Loss?
Recurrent pregnancy loss (RPL), also called recurrent miscarriage, refers to repeated pregnancy losses. The European Society of Human Reproduction and Embryology (ESHRE) supports considering the diagnosis after two or more pregnancy losses. Definitions can differ between professional guidelines, so your doctor will interpret your history in the appropriate clinical context.
A specialist may review:
- The number and timing of previous pregnancy losses.
- Your age and reproductive history.
- Previous ultrasound findings and pregnancy records.
- Existing medical conditions and medications.
- Your partner's reproductive and medical history.
You do not always need to wait for a third miscarriage before discussing an evaluation with a specialist.
Why Is a Structured Evaluation Important?
Many early miscarriages occur because an embryo has an abnormal number of chromosomes. These changes often happen by chance and become more common with increasing maternal age.
When pregnancy losses happen repeatedly, a systematic evaluation can help identify potentially treatable conditions, assess relevant risk factors and avoid unnecessary investigations. A recurrent miscarriage workup is not simply a long list of blood tests. It is a clinical assessment tailored to your history.
1 Genetic Causes
Chromosomal abnormalities in an embryo are a common cause of early miscarriage. In some couples, one partner may carry a balanced chromosome rearrangement, such as a translocation. The parent may have no symptoms, but the rearrangement can sometimes result in an embryo with an unbalanced chromosome pattern.
What may be investigated?
- Pregnancy tissue testing: May help explain a previous loss when testing is available and appropriate.
- Parental karyotyping: May be considered when the history or other findings suggest a genetic cause.
- Genetic counselling: Helps couples understand results, reproductive options and future pregnancy considerations.
Not every couple requires all these investigations. Your specialist can explain which tests are likely to be useful in your situation.
2 Uterine and Anatomical Causes
The structure of the uterus can influence implantation and pregnancy development. Some uterine conditions may be associated with recurrent pregnancy loss.
- Uterine septum: A band of tissue that partially divides the uterine cavity.
- Fibroids or polyps: Growths that may be relevant when they distort the uterine cavity.
- Intrauterine adhesions: Scar tissue inside the uterus.
- Adenomyosis: A condition involving tissue similar to the uterine lining within the muscular wall of the uterus.
Which investigations may help?
- Pelvic or transvaginal ultrasound.
- Three-dimensional ultrasound for additional anatomical detail when appropriate.
- Hysteroscopy or MRI when further investigation is indicated.
Finding an anatomical difference does not automatically mean it caused the miscarriages or that surgery is necessary. The significance of the finding and potential treatment benefits must be assessed individually.
3 Hormonal and Metabolic Factors
Certain endocrine and metabolic conditions can affect reproductive health and pregnancy outcomes. Investigations should be selected according to the patient's history and clinical findings.
- Thyroid function: TSH testing, with additional thyroid investigations when indicated.
- Diabetes: Assessment of blood glucose and diabetes control where relevant.
- PCOS: Evaluation when symptoms or history suggest polycystic ovary syndrome or associated metabolic concerns.
- Other hormonal tests: Considered when specific clinical findings justify them.
Not every patient needs every hormonal or metabolic test. For example, insulin testing should not automatically be included in every workup without a clinical reason.
4 Immunological and Blood-Clotting Factors
One important condition assessed in recurrent pregnancy loss is antiphospholipid syndrome (APS). This autoimmune condition is associated with an increased risk of blood clots and certain pregnancy complications.
Tests used to assess APS
- Lupus anticoagulant.
- Anticardiolipin antibodies.
- Anti-beta-2 glycoprotein I antibodies.
A single positive result does not necessarily establish APS. Repeat testing at least 12 weeks later is generally required to demonstrate persistent antibody positivity, alongside the relevant clinical criteria.
Other immune tests and inherited blood-clotting disorder investigations are not routinely required for everyone. Their use depends on specific clinical indications.
5 Lifestyle and Male-Partner Factors
Recurrent pregnancy loss is a concern for both partners. A complete evaluation should not focus exclusively on the woman.
- Smoking and tobacco exposure.
- Alcohol consumption.
- Body weight and general metabolic health.
- Maternal and paternal age.
- Existing medical conditions and medications.
- Relevant male reproductive factors, including sperm DNA fragmentation testing in selected cases.
Both partners can discuss practical steps to support preconception health, including stopping smoking, avoiding alcohol when trying to conceive, maintaining a balanced diet and managing existing health conditions with appropriate medical advice.
These steps support general reproductive health, but they cannot guarantee that a future miscarriage will be prevented.
Which Tests and Treatments Are Not Routinely Recommended?
An evidence-based workup also involves recognising when a test is unlikely to improve care. Depending on the circumstances, routine investigations or treatments that are generally not recommended for unexplained recurrent pregnancy loss include:
- Natural killer (NK) cell testing as a routine diagnostic test.
- Routine partner HLA compatibility testing.
- Inherited thrombophilia testing without an appropriate clinical indication.
- Steroids, IVIG or other immune treatments without a supported indication.
- IVF with PGT-A solely as a routine way to prevent unexplained miscarriage.
Some investigations and treatments may have specific uses in other clinical situations. However, they should not automatically be offered to every couple with recurrent pregnancy loss. Avoiding unnecessary tests can reduce financial costs, anxiety and the risk of treatments that have not been shown to provide meaningful benefit.
Unexplained Recurrent Pregnancy Loss: Is a Healthy Pregnancy Possible?
Sometimes, a thorough evaluation does not identify a definite cause. This is known as unexplained recurrent pregnancy loss. Not having a clear explanation can be frustrating, but it does not mean that a successful pregnancy is impossible.
ACOG reports that approximately 65 in 100 women with unexplained recurrent pregnancy loss have a successful next pregnancy. This is a general estimate, not an individual prediction. The outlook varies with age, pregnancy history and other clinical factors.
How may care be planned?
- Individualised pregnancy planning: Review previous losses, medical conditions and available results.
- Management of identified conditions: Treat specific problems when evidence supports doing so.
- Early pregnancy follow-up: Arrange appropriate reviews and ultrasound scans according to clinical need.
- Medication when indicated: Consider progesterone in selected circumstances rather than prescribing it universally.
- Emotional support: Acknowledge grief and anxiety and help couples access appropriate support.
Supportive care is an important part of management. Couples should receive honest discussions about what is known, what remains uncertain and which interventions are likely to help.
How Dr. Sindhura Bandi Approaches Recurrent Pregnancy Loss
At KIMS Fertility IVF Centre, Banjara Hills, Hyderabad, Dr. Sindhura Bandi approaches recurrent pregnancy loss by considering both partners' histories, previous pregnancy outcomes, age, medical conditions and available investigation results.
The aim is to develop a personalised plan based on clinical evidence and individual needs. Depending on the findings, this may involve targeted investigations, management of identified medical conditions, genetic counselling, pregnancy planning and appropriate follow-up.
When no definite cause is found, couples should still receive clear explanations, realistic expectations and compassionate care. No investigation or treatment can guarantee a successful pregnancy, but a structured approach can help couples make informed decisions about their next steps.
When Should You Consult a Fertility Specialist?
Consider discussing an evaluation with a fertility specialist if:
- You have experienced two or more pregnancy losses.
- You have a known thyroid condition, diabetes, PCOS or an autoimmune condition that may affect pregnancy planning.
- You have a history of later pregnancy loss or other complications that warrant specialist assessment.
- You have concerns about your reproductive health or want guidance before trying to conceive again.
Bring previous ultrasound reports, pregnancy records, laboratory results and treatment details to your appointment, if available. You do not need to complete every possible test before seeking advice.