Recurrent Pregnancy Loss: Causes, Tests and What Comes Next

Medically reviewed by Dr Manjushree Boob — MD, DNB, FICMCH, FICOG, Infertility & IVF Consultant, Shubham Hi-Tech Hospital and Test Tube Baby Centre, Amravati.

There is a particular kind of exhaustion that comes with a second loss. The first time, people rally around you with kindness. By the second, you have started noticing what nobody says out loud, and you walk into my room wanting one thing above sympathy: an actual answer.

I cannot always give you a single cause. What I can give you is a clear, honest process for finding out what is knowable — and for treating what we find.

What “recurrent” actually means

The older definition asked for three consecutive losses before starting a work-up. Most of us have moved away from that. Two losses is now widely accepted as a reasonable trigger to begin investigating, and I would not make a couple wait for a third if either of you is over 35, if a scan or an earlier surgery already flagged something inside the uterus, or if a loss happened later than the first few weeks. Timing matters as much as the number.

It is also worth saying plainly: a single miscarriage is common and, on its own, tells us very little. It is the pattern, not the first event, that earns real attention.

What we are actually looking for

The causes fall into a few broad groups, and in my experience patients feel steadier once they can picture them rather than imagine everything at once.

The embryo itself. A chromosomal problem in that particular pregnancy is, by far, the single most common reason for any one loss — including a repeated one. This becomes more likely with age and is nobody’s fault.

The shape of the uterus. A septum dividing part of the cavity, a fibroid pushing into it, or scarring from a previous procedure can all interfere with a pregnancy holding on, even when everything else about it is healthy. This is usually seen on a good scan or a hysteroscopy, and it is often correctable.

Hormones and metabolism. An under- or over-active thyroid, poorly controlled diabetes, and some PCOS-related hormone imbalances can all make it harder for a pregnancy to establish and continue.

Clotting and immune factors. Antiphospholipid syndrome is the best-established of these — a condition where the blood clots in a way that can affect the placenta. It is treatable once identified.

Unexplained. Even after a full work-up, a real proportion of couples get no single answer. That is frustrating to hear, but it is not the same as nothing being done, and it is not the end of the story.

“The doctor tested our first loss and said it was a chromosomal problem. Does that mean the next one will be the same?”

Not necessarily. A chromosomal problem found in one pregnancy tells us about that pregnancy, not automatically about the next one. Some couples do have a pattern worth investigating further; many simply had an unlucky roll on that particular occasion. This is exactly the kind of question your work-up should settle rather than leave you guessing at home.

The work-up: what actually helps

A sensible evaluation usually includes a pelvic ultrasound to look at the shape of the uterine cavity, blood tests for thyroid function and for the clotting antibodies linked to antiphospholipid syndrome, and a review of blood sugar control. Where the scan raises a question about the cavity, a hysteroscopy gives a direct look and can often treat what it finds in the same sitting — our page on diagnostic and operative hysteroscopy walks through how that procedure works. Parental chromosome testing (karyotyping) is reserved for specific situations, not offered to everyone as routine.

What I would gently steer you away from: long, expensive panels of immune markers with no agreed treatment attached to an abnormal result, and any add-on sold to you as improving your odds without real evidence behind it. Grief is not a good state in which to be sold uncertain tests.

“Is there anything we did that caused this?”

Almost certainly not. Lifting something heavy, a stressful week, travelling, an argument at home — none of these cause a miscarriage, once or repeatedly. The mechanisms we actually find are chromosomal, structural, hormonal or immune, and none of them are something you did to yourselves.

What to expect at your appointment

Bring whatever records you have of the previous losses — scan reports, discharge summaries, how far along each pregnancy was. We will go through the timeline together, do a general check and a pelvic examination, and usually arrange a scan and the relevant blood tests. None of this needs to happen in a single anxious rush; a proper work-up over a few weeks gives more reliable answers than trying to do everything on the first visit.

Myth versus fact

Myth: nothing can be done until we find the exact cause. Fact: several of the known causes — a uterine septum, a thyroid problem, antiphospholipid syndrome — are directly treatable, and treating them measurably improves the odds even without a perfect single explanation for every past loss.

Myth: once you have had recurrent losses, IVF is the only way forward. Fact: IVF is not automatically the answer here. Some couples conceive naturally once a structural or hormonal issue is corrected. IVF becomes relevant mainly when there is a separate fertility problem alongside the pregnancy losses, or in specific situations such as needing genetic testing of embryos before transfer.

A short self-check

Consider asking for a work-up sooner rather than later if any of these apply to you: you are 35 or older, a previous scan mentioned a fibroid, polyp or unusual shape to the uterus, a previous loss happened later than the first eight to ten weeks, or you have a known thyroid condition or diabetes that has not been recently checked.

Moving forward

Once we know what we are dealing with, the next pregnancy is usually managed with more attention rather than more anxiety — an earlier scan, closer follow-up in the first trimester, and specific treatment where one applies, such as low-dose medication for antiphospholipid syndrome or correction of a uterine finding beforehand. Most couples who go through this process do go on to carry a pregnancy successfully.

If you have been through this more than once and want a proper, structured work-up rather than another round of guessing, our fertility team at Shubham Hi-Tech Hospital and Test Tube Baby Centre in Amravati will sit down with your full history and walk you through it. Call +91-8668954915 or reach us through our contact page.

Disclaimer: This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor for guidance specific to your situation.