Recurrent Pregnancy Loss: Causes, Evaluation, and Treatment in San Diego

Recurrent Pregnancy Loss: Causes, Evaluation, and Treatment in San Diego

Experiencing one miscarriage is devastating. Experiencing two, three, or more is a distinct medical condition — recurrent pregnancy loss (RPL) — that warrants systematic evaluation to identify treatable causes and implement evidence-based interventions. For San Diego couples navigating this painful experience, understanding what RPL evaluation involves, what causes can be identified and treated, and what outcomes are realistic with appropriate care provides a foundation for moving forward with informed hope.

Defining Recurrent Pregnancy Loss

Recurrent pregnancy loss is defined by most professional societies as two or more clinical pregnancy losses. Some organizations define it as three or more losses, but the trend in reproductive medicine is toward earlier evaluation after two losses — recognizing that waiting for a third loss causes significant emotional harm and may delay identification of treatable conditions.

The distinction between "clinical" pregnancy loss (confirmed on ultrasound or by pathology) and biochemical pregnancy loss (positive pregnancy test that doesn't progress) is important for diagnostic purposes. Both types are emotionally significant, but evaluation protocols and treatment considerations may differ between them. A complete reproductive history — including all pregnancies, their outcomes, gestational ages at loss, and any evaluation performed after prior losses — provides essential context for current evaluation.

Common Identifiable Causes

Chromosomal abnormalities in the embryo are the most common cause of individual pregnancy losses, accounting for approximately 50-60% of first trimester miscarriages. When losses recur, the probability that all losses reflect random chromosomal events decreases, increasing the likelihood that an underlying maternal or paternal factor is contributing. That said, even in couples with RPL, a significant percentage have no identifiable cause after comprehensive evaluation — a diagnosis of unexplained RPL that still carries a meaningful prognosis for successful subsequent pregnancy.

Uterine anatomical abnormalities — septate uterus, submucous fibroids, intrauterine adhesions — can impair implantation and early pregnancy development and are found in a meaningful minority of RPL patients. Genetic carrier status in one or both partners can produce recurrent chromosomally abnormal embryos. Antiphospholipid syndrome, an autoimmune thrombophilia, is one of the most important treatable causes of RPL, found in approximately 10-15% of patients with recurrent losses. Hormonal and metabolic factors including thyroid dysfunction, elevated prolactin, and uncontrolled diabetes can also contribute.

Recommended Evaluation

A systematic RPL evaluation addresses the major identifiable causes through a structured set of investigations. Uterine cavity assessment through saline infusion sonography (SIS), hysterosalpingography (HSG), or office hysteroscopy evaluates the uterine anatomy. Peripheral blood karyotyping of both partners identifies chromosomal carrier status. Antiphospholipid antibody testing screens for the syndrome that is among the most actionable RPL causes. Thyroid function testing and prolactin measurement assess relevant hormonal factors.

Products of conception testing from prior losses — if available — can identify whether chromosomal abnormalities were present, helping distinguish between recurrent chromosomally abnormal embryos (suggesting possible parental carrier status or age-related quality issues) and recurrent chromosomally normal losses (more likely to reflect maternal uterine, immunological, or thrombophilic factors). This information shapes subsequent treatment planning. Specialized RPL evaluation at a dedicated IVF fertility doctor San Diego ensures comprehensive assessment that covers all evidence-based investigation categories.

Treatment Approaches

When an underlying cause is identified, targeted treatment can meaningfully improve outcomes. Antiphospholipid syndrome is treated with low-dose aspirin and heparin during pregnancy, protocols that have been shown in randomized trials to significantly improve live birth rates in this population. Uterine septal resection through operative hysteroscopy addresses the anatomical abnormality that may be impeding pregnancy success. Thyroid optimization and prolactin normalization correct hormonal factors that may contribute to early pregnancy failure.

For couples whose RPL may reflect recurrent chromosomally abnormal embryos — older patients, those with prior products of conception testing confirming chromosomal abnormalities — preimplantation genetic testing for aneuploidy (PGT-A) through IVF allows selection of chromosomally normal embryos before transfer. This approach has been shown to reduce miscarriage rates and improve cumulative live birth rates in specific RPL populations. Progesterone supplementation in the luteal phase and early pregnancy is commonly used empirically and has demonstrated benefit in at least one large randomized trial for patients with unexplained RPL.

Emotional Support Through RPL

The psychological burden of recurrent pregnancy loss is profound — grief, anxiety, fear of future pregnancies, and relationship strain are common experiences for couples navigating RPL. Fertility centers that build psychological support into their RPL care model recognize that the emotional journey is as important to manage as the medical one. Access to counseling, support groups, and peer connection with others who have experienced similar losses helps couples process grief and maintain the resilience needed to continue pursuing their family-building goals. A compassionate fertility specialist San Diego team addresses both dimensions of this experience — the medical and the human.

Conclusion

Recurrent pregnancy loss is a complex condition that deserves systematic, comprehensive evaluation and individualized treatment. While a significant proportion of RPL cases have no identifiable cause, even unexplained RPL carries a meaningful prognosis for eventual live birth with appropriate monitoring and support. For San Diego couples facing this challenge, working with experienced fertility specialists who offer thorough evaluation, evidence-based treatment, and genuine emotional support is the most important step toward the family they hope to build.