Recurrent Miscarriage Is Not Bad Luck: The Root-Cause Workup for Recurrent Pregnancy Loss

Here is the honest part first. A single early miscarriage really is often a chromosomal accident in that one pregnancy. ACOG puts chromosomal abnormalities behind roughly half of early pregnancy losses, and the share is higher still in the earliest weeks. Nothing anyone did. But when losses stack up, "chance" stops explaining it, and a real workup begins.

When two losses is the number that changes the plan

For years the rule was three consecutive losses before you got a workup. That has changed. The 2026 American Society for Reproductive Medicine (ASRM) committee opinion defines recurrent pregnancy loss as two or more losses, and it explicitly states they do not have to be consecutive. Two is now the number that earns an evaluation, not a shrug. (Some systems, such as the UK's, still use three consecutive losses, so the threshold you are held to can depend on where you are seen.)

That matters because waiting for a third loss to "qualify" is waiting for another loss. If you have had two, the door to the workup is already open. You do not have to argue your way through it.

The causes that are real, findable, and treatable

A proper workup is not a fishing trip. It targets the causes that actually recur, the ones a single test can confirm and a treatment can change.

• Antiphospholipid syndrome (APS). An autoimmune clotting disorder, and the single most important treatable cause of recurrent loss. Blood tests for antiphospholipid antibodies confirm it. Left alone it drives loss rates dangerously high; treated with low-dose aspirin and heparin, live birth rates improve sharply.
• Parental chromosome rearrangements. In a small share of couples, roughly two to five percent in cytogenetic studies of recurrent loss, one partner carries a balanced translocation. Their own chromosomes are complete and they are healthy, but the arrangement can pass unbalanced to an embryo. A blood karyotype on both partners finds it.
• Uterine anatomy. A uterine septum, a wall of tissue dividing the cavity, has fair evidence linking it to loss. Fibroids or polyps inside the cavity can do the same. Saline sonohysterography or hysteroscopy sees the shape of the cavity that a routine scan misses.
• Thyroid and endocrine. An underactive thyroid raises risk and is easy to check with a TSH blood test and easy to treat. Uncontrolled diabetes belongs on the same list.

Testing the miscarriage tissue itself, when possible, is now a first step too. If a loss was chromosomally abnormal, that answers a lot on its own.

The tests that sound thorough but are not

The trap runs the other way as well. A long menu of tests can feel like proof someone is finally taking you seriously, when several of them change nothing.

Routine screening for inherited thrombophilias is not recommended without a personal or family clotting history. MTHFR gene variants alone are not a proven cause of loss, and treating them is not supported. Natural killer (NK) cell panels and broad immune testing sit in the investigational column: they may matter in some unexplained cases, but the studies are too weak to guide treatment, and the therapies sold off them can carry real risk. Even thyroid antibody testing does not change the plan when thyroid function itself is normal.

Evidence-based means knowing which tests decide something. A workup that orders everything is not more careful. It is less.

How Healz reads a recurrent loss case

This is where a second opinion earns its name, not by ordering more, but by ordering right. Healz puts the whole case in one place. One chat, not ten apps. Frontier AI runs on your case, built to investigate at the root instead of managing at the surface.

Healz's root-cause technology works the case at the root. It sorts the evidence-based tests, antiphospholipid antibodies, parental karyotype, uterine assessment, thyroid, from the investigational panels that decide nothing. It cross-checks your case against 1M+ others, so a treatable cause is not missed or buried under an unproven one. Memory holds every loss, date, and lab in one timeline and connects them, working alongside the root-cause read so patterns live in the sequence.

When you want expert eyes on it, you can bring a board-certified doctor into the same chat for a second opinion.

Five ways to keep your own case honest

1. Count your losses out loud. Two or more, consecutive or not, now meets the threshold for a full workup. You do not have to wait for a third.
2. Ask which cause each test is chasing. APS, karyotype, uterine anatomy, thyroid. A test that maps to a treatable cause earns its place.
3. Question the long panel. If a test would not change what happens next, ask why it is being run. This is the same never stop at the first label discipline applied to over-testing.
4. Keep the timeline whole. Dates, gestational ages, tissue results, antibody labs, in one place. Patterns live in the sequence.
5. Hold onto the real odds. Even after two or three losses, most couples go on to a successful pregnancy. The workup narrows the risk. It does not erase the hope.

Recurrent miscarriage is not a run of bad luck that eventually breaks on its own. It is a question that deserves the right tests, in the right order, read against the whole history. "Bad luck" is a comfort. A workup is an answer.

Healz was built to chase the cause, not close the file. The wise run Healz.