Recurrent Pregnancy Loss Workup

When Testing Is Warranted

Recurrent pregnancy loss is clinically defined as two or more spontaneous losses. After a single miscarriage, most providers don't recommend an extensive workup — roughly 50% of first-trimester losses are caused by random chromosomal abnormalities that are unlikely to recur.

After two losses, ACOG recommends a thorough physical exam and testing to look for a cause; the losses do not have to be consecutive. Waiting for three losses is not required before discussing an evaluation.

The 2025 SOGC guideline also defines recurrent pregnancy loss as two or more losses, including losses that are not consecutive. If your provider is still waiting for three losses before investigating, you can ask about evaluation after two.

What the Workup Covers

A full recurrent loss evaluation typically includes four categories of testing:

Genetic testing (parental karyotyping) Both parents provide a blood sample for a peripheral blood karyotype. This identifies balanced chromosomal translocations — structural rearrangements where the parent carries the right amount of genetic material but in the wrong arrangement. About 3-5% of couples with recurrent loss carry a balanced translocation. Cost: $400-$800 per person without insurance.

Cytogenetic testing on products of conception If tissue was preserved from the most recent miscarriage, chromosomal microarray analysis can determine whether the loss was caused by a fetal chromosomal abnormality. This is the single most informative test in a recurrent loss workup. Tissue must have been stored in sterile saline at refrigerator temperature — never frozen, never placed in formalin. Cost: $1,000-$3,000 depending on the lab and whether your insurer classifies it as "medically necessary."

Immunological and thrombophilia panel Antiphospholipid syndrome is a treatable autoimmune cause of recurrent loss. The panel includes lupus anticoagulant, anticardiolipin antibodies (IgG and IgM), and anti-beta-2 glycoprotein I antibodies. Persistent antibodies must be positive on two tests at least 12 weeks apart; a clinician also considers the clinical criteria before diagnosing APS. Treatment with low-dose aspirin and heparin during subsequent pregnancies can improve live birth rates.

Uterine anatomy assessment A saline-infusion sonohysterogram or hysteroscopy evaluates the uterine cavity for structural abnormalities — septate uterus, polyps, fibroids, or intrauterine adhesions (Asherman syndrome). A septate uterus is the most common congenital anomaly linked to recurrent loss and is surgically correctable.

Insurance Coverage Realities

Some insurers classify genetic testing on products of conception as "investigational" or "not medically necessary" without a documented history of two or more losses. Your provider can improve approval odds by including prior loss history, abnormal ultrasound findings, and a clear statement of medical necessity in the authorization request.

Coverage and prior-authorization requirements for parental karyotyping, thrombophilia panels, and uterine imaging depend on the plan. Before testing, ask the insurer what it covers and what documentation it requires for each test.

If a claim is denied, the appeal can identify ICD-10-CM code N96 (recurrent pregnancy loss) and cite ACOG guidance on repeated miscarriages. Practice Bulletin No. 200 addresses early pregnancy loss management, not recurrent-loss workups.

What the Results Actually Change

About 50% of recurrent loss workups come back entirely normal. That can feel devastating, but it's actually encouraging — couples with unexplained recurrent loss have a 60-75% chance of a successful subsequent pregnancy without any intervention.

Treatment depends on the finding: antiphospholipid syndrome is treated with low-dose aspirin and heparin during pregnancy; surgery can be discussed for selected uterine anomalies; and genetic counseling can explain whether IVF with preimplantation genetic testing is appropriate for a balanced translocation.

The After a Miscarriage toolkit includes a consultation questions checklist specifically designed for follow-up appointments, covering the exact clinical and pathological questions that most people don't know to ask.