How many miscarriages count as recurrent pregnancy loss?
Two. The American Society for Reproductive Medicine’s 2026 committee opinion defines recurrent pregnancy loss as the spontaneous loss of two or more pregnancies, excluding molar and ectopic pregnancies. That is the point at which an evaluation is recommended.
The 2026 update clarified three details that matter for how women count their own history:
- Very early losses count. A pregnancy confirmed only by a positive blood or urine test, sometimes called a chemical pregnancy, counts toward the total. An ultrasound is not required.
- Losses do not need to be in a row. A live birth between two losses does not reset the count.
- Two is enough to start. Waiting for a third loss is no longer the standard.
The European Society of Human Reproduction and Embryology uses the same two-loss threshold in its 2022 guideline update. If you have been told to come back after another loss, it is reasonable to ask whether that advice reflects current guidance.
How common is it to lose more than one pregnancy?
Losing more than one pregnancy is uncommon. A 2021 analysis in The Lancet by Quenby and colleagues estimated that 15.3 percent of recognized pregnancies end in miscarriage, but only 1.9 percent of women experience two miscarriages and 0.7 percent experience three or more.
Those numbers point in two directions at once. A single miscarriage is common, which is why it is often treated as chance. Repeated miscarriage is far less common, which is why it deserves a closer look.
Age changes the picture. A 2019 study in the BMJ that followed more than 400,000 pregnancies in Norway found that miscarriage risk was lowest, about 10 percent, for women aged 25 to 29, and rose to 53 percent for women aged 45 and over. The same study found that each previous miscarriage raised the risk of the next one.
If you are in your late thirties or forties, chance and age really are part of the story. They are just not the whole story, and they are not a reason to skip an evaluation.
Why do some doctors still wait for a third loss before testing?
Some doctors wait for a third loss because older definitions of recurrent miscarriage required three consecutive losses, and that habit has outlasted the guidelines. ASRM’s previous committee opinion on recurrent loss was published in 2012, and its June 2026 update was the first in over a decade.
There were also practical reasons. Testing costs money, many single losses are caused by chromosome errors that will not repeat, and the outlook after two losses is still good. Those points are true. But the 2026 guidance concluded that a targeted evaluation after a second loss is worthwhile, starting with the most informative step, testing the pregnancy tissue.
If your doctor suggests waiting, a calm question can open the conversation: “I understand ASRM now recommends evaluation after two losses. Could we talk about what that would include for me?”
That is not challenging your doctor. It is asking them to apply current guidance to your history, which is exactly what good care looks like.
What does unexplained recurrent loss actually mean?
“Unexplained” often means the most informative test was never done. ASRM’s 2026 guidance notes that without chromosome testing of the pregnancy tissue, a high percentage of women with recurrent loss remain unexplained. With that testing, studies have found an explanation in over 90 percent.
The reason is simple. Between 50 and 60 percent of first-trimester miscarriages are caused by chromosome errors in the embryo. If the tissue is tested and shows one, that loss has an explanation. If the tissue shows normal chromosomes, the evaluation turns toward the uterus, blood clotting, thyroid function, and blood sugar.
Without the tissue result, neither path is clear, and women are more likely to be offered tests and treatments that lack evidence.
So when you hear that your losses are unexplained, it helps to ask a precise follow-up question: “Unexplained after which tests?” The answer tells you whether the investigation is finished or simply has not started.
What are my chances of a successful pregnancy after recurrent loss?
Your chances are better than most women expect. ASRM’s 2026 guidance reports that 50 to 80 percent of women with recurrent pregnancy loss have a successful next pregnancy with no specific treatment.
The range is wide because chances depend on several factors:
- Age: the 2019 BMJ study found miscarriage risk rising steadily after 30.
- Number of previous losses: each additional loss modestly raises the risk of another.
- Cause, when one is found: some causes, such as antiphospholipid syndrome or an uncontrolled thyroid or blood sugar problem, have effective treatments.
ASRM also highlights something that sounds soft but shows up in the data: supportive care. In one small, older study, women with recurrent loss who received weekly check-ins and ultrasounds in their next pregnancy had a live birth rate of 85 percent, compared with 36 percent in routine care. That study was not randomized, so it cannot prove cause and effect, but ASRM cites it in calling psychological support an essential part of care.
Hope here is not wishful thinking. It is what the numbers show.
From Heather
I heard "it's just bad luck" after my fourth loss.
After my fourth loss, a doctor told me, “Sometimes it’s just bad luck.” By then I had been pregnant four times, and every one of those pregnancies had ended at around the same point, nine or ten weeks.
I was done accepting bad luck as the whole answer. Not because chance plays no part, but because nobody had shown me how they knew.
That is the shift I want for you. Chance can be part of your story. It should be a finding, something your care team arrives at after looking, not the place the conversation stops.
In my work I call this process Fertility Block Mapping: laying out your history, what was tested, what came back, and what was never asked, so you can see the gaps clearly and walk into your next appointment with specific questions. It does not replace the medical evaluation. It helps you get the one you deserve.
