Miscarriage: the rule that changed in June

Clinical Rounds, the GPAtlas podcast. Pregnancy & Antenatal Care. 19 minutes. Published 31 August 2026. Free to listen.

Clinical source: our own Ocean article "Miscarriage", last reviewed 29 June 2026.

Transcript

Sarah: Hello, and welcome to GPAtlas Clinical Rounds. I'm Sarah, and this is the podcast where we take one thing you'll genuinely see this week and work out what to do with it.

Ben: And I'm Ben. Today, miscarriage. A rule that changed in June this year, and the thing you have to exclude before anything else.

Sarah: So. A woman rings the surgery on a Saturday morning. She's seven weeks pregnant, she's started bleeding overnight, and she's got some cramping. She's frightened and she's asking whether she should just wait and see. And the whole of this episode is about the order in which you think about that call, because the most likely answer and the most important answer are different things.

Ben: Three things. Ectopic first, always, and why the reassuring features aren't reassuring. Where she goes and how fast. And the anti-D rule, which reversed in June and is the thing most likely to be done from memory and done wrong.

Sarah: So, ectopic. Our article's opening position is the one to work from: any woman of reproductive age with a positive pregnancy test and pain, or pelvic, abdominal or cervical motion tenderness, has an ectopic pregnancy until proven otherwise. You refer immediately, and you assess haemodynamic stability first.

Ben: And two things that feel like they should lower your suspicion and don't. Around a third of ectopic pregnancies occur with no risk factors at all, and the presentation is often atypical. So the risk-factor history that comes back clean has excluded very little.

Sarah: And the second: examination never excludes ectopic. A soft, non-tender abdomen does not rule it out. Which is uncomfortable, because examining someone and finding nothing is normally how we downgrade our concern, and here it simply isn't available to us.

Ben: There are two symptoms our article says to ask about directly, because patients don't volunteer them. Shoulder-tip pain, and pain on defecation. Both suggest blood in the peritoneum. Neither sounds gynaecological to the patient, so unless you ask the specific question you won't hear about them.

Sarah: A third have no risk factors. And a soft abdomen excludes nothing.

Sarah: So where does she go, and this is where I think people default to the wrong destination out of kindness. If she's haemodynamically unstable, in severe pain, or bleeding very heavily, that's immediate admission to A and E or gynaecology, and our article puts it in brackets: not an EPAU appointment.

Ben: And that's worth dwelling on, because the early pregnancy unit feels like the right, gentle, specialist place to send a frightened pregnant woman. It is, for the stable ones. For the unstable one it's a delay dressed up as appropriateness.

Sarah: There's a quantified threshold for the bleeding, which helps on the phone: soaking more than one pad an hour, or passing large clots, is significant haemorrhage and an emergency admission. That's a question you can ask a woman at home and get a usable answer to.

Ben: For everyone else the routing is by gestation. Under six weeks, with bleeding, no pain and no risk factors: expectant management in primary care, with a repeat urine test after seven to ten days. Suspected miscarriage with bleeding and pain, at six weeks or more, or where the gestation is uncertain: EPAU, within twenty-four hours if clinically warranted.

Sarah: Unstable goes to A and E. Not to the early pregnancy unit.

Sarah: Now the change, which is the reason this episode exists. Anti-D. And the reason it matters is that most of us learned a rule that is no longer the rule, and it was a rule about management, and it is now a rule about gestation.

Ben: Our article names the error directly: still applying the old anti-D for surgical management only rule. Since the June twenty twenty-six update to NG126, the decision no longer turns on medical versus surgical management but on gestation.

Sarah: So the current position. Do not offer anti-D for an ectopic pregnancy, a miscarriage, or a threatened miscarriage up to and including eleven weeks and six days, and that now applies to both medical and surgical management. That's the reversal. Below twelve weeks, nobody gets it, whatever was done.

Ben: And then: offer anti-D immunoglobulin, two hundred and fifty international units, so fifty micrograms, to Rhesus-negative patients at twelve weeks to twelve weeks and six days who have medical or surgical management of a miscarriage or an ectopic. And do not use a Kleihauer test in this first-trimester setting.

Sarah: So the question you ask has changed. It used to be what was done to her. Now it's how many weeks was she. And if you're carrying the old rule, you'll give anti-D to a woman at ten weeks who had surgical management, which is now not indicated, and you may miss it at twelve weeks after medical management, which now is.

Ben: Twelve weeks is the line now. Not medical versus surgical.

Sarah: A few numbers that make the scan and blood results readable when they come back, because she'll ring you about them. Miscarriage is diagnosed when there's no fetal heartbeat with a crown-rump length of seven millimetres or more, or no fetal pole with a mean gestational sac diameter of twenty-five millimetres or more. Below those, the scan is repeated after a minimum of seven days.

Ben: And for a pregnancy of unknown location, two hCG samples forty-eight hours apart: a rise of more than sixty-three per cent suggests a developing intrauterine pregnancy, a fall of more than fifty per cent suggests a failing one, and anything in between needs clinical review within twenty-four hours. That middle band is the ectopic-shaped answer, and it's the one that needs the fastest response.

Sarah: And knowing the seven-day rule matters for what you say to her, because a repeat scan in a week is not the unit being slow or unsure. It's the diagnostic criterion. If she understands that, the week is bearable. If she thinks they just couldn't tell, it's a week of thinking something has gone wrong with her care.

Ben: The repeat scan in seven days is the criterion, not a delay.

Sarah: Management of a confirmed miscarriage, briefly, because much of it is not ours but she'll ask. Expectant management is first-line for seven to fourteen days if she's stable, and most need no further treatment.

Ben: The medical regimens differ by type, and there's a detail that matters: for an incomplete miscarriage it's a single dose of misoprostol six hundred micrograms, with eight hundred an acceptable alternative, and mifepristone is not used for incomplete miscarriage. For a missed miscarriage it's oral mifepristone two hundred milligrams, then misoprostol eight hundred micrograms forty-eight hours later.

Sarah: And progesterone, which patients read about and ask for. It's targeted, not universal. NICE restricts it to women who have vaginal bleeding, a previous miscarriage, and an intrauterine pregnancy confirmed on scan. It's started through the EPAU and continued only to sixteen completed weeks if a fetal heartbeat is seen. So it isn't something to promise or to start in primary care.

Ben: Progesterone is for a specific three. Not for everyone bleeding.

Sarah: And then the follow-up, which is where general practice does most of its actual work in this, and where things get dropped. Confirm completion: a urine pregnancy test three weeks after the miscarriage should be negative, and a positive test needs review to exclude retained, molar or ectopic pregnancy. That's a three-week task with somebody's name on it, and often nobody's.

Ben: Recurrent miscarriage is three or more consecutive losses, and increasingly two or more, and that warrants referral for investigation, although our article notes it sits outside NG126. And women with recurrent miscarriage, or a previous ectopic or molar pregnancy, can self-refer to the EPAU in future pregnancies, which is worth telling them, because it removes us as a bottleneck next time.

Sarah: And future pregnancy advice, which is the hopeful part and true: reassure that most women go on to have a successful pregnancy. Folic acid four hundred micrograms daily, or five milligrams if she's higher risk. Vitamin D. And smoking and alcohol cessation when she's ready to conceive.

Ben: A pregnancy test at three weeks. Somebody has to own that.

Sarah: And the conversation itself, which is the part that stays with people for years. Our article gives its own words for the patient, and I'd use them close to verbatim, because they're carefully built. A miscarriage is the loss of a pregnancy, usually within the first few months. It is sadly common, and is almost never caused by anything you did or could have done differently.

Sarah: That second sentence is doing the heavy lifting. Almost every woman is running through what she did. The lifting, the coffee, the row, the flight. And unless you say it explicitly, unprompted, she'll assume you're being polite. Saying it before she asks is the difference.

Ben: And it gives the practical half too: we'll arrange a scan at the early pregnancy unit to see exactly what is happening, and talk through the safest way forward together. Which tells her something is happening, without pretending to know the outcome.

Sarah: And the prompts for the rest of the consultation, which I think are the difference between a competent and a good one. This must be a very worrying time, so ask how she and her partner are coping emotionally and whether they have support. And explore what she fears is happening, what she hopes the scan will show, and how much information she wants at this stage. That last bit matters, because not everybody wants all of it today.

Ben: Then acknowledge the loss, validate the grief, signpost the Miscarriage Association and Tommy's, and offer a follow-up appointment. And one practical thing many people don't know: in England and Scotland a baby loss certificate is available for losses before twenty-four weeks.

Sarah: Say it before she asks. Almost never anything she did.

Ben: And the safety-net, worded in our article as something to say explicitly rather than imply. Return immediately or call nine nine nine for severe or worsening pain, heavy bleeding soaking pads, shoulder-tip pain, faintness or collapse. Shoulder-tip pain is in that list for the reason we opened with, and she will not know why it matters unless you tell her.

Sarah: And one aftercare point that's easy to forget to mention and awkward for her to ask: avoid sexual intercourse until the bleeding has stopped, because of infection risk.

Ben: Shoulder-tip pain belongs in the words you give her.

Ben: There's a structural point worth adding, which is that most of this episode happens on the telephone. She rings on a Saturday, or she rings the duty doctor, and the person taking that call has to sort her into one of three or four destinations without seeing her.

Ben: Which is why the specific questions matter more than usual. Is the pain constant or crampy. Is there any shoulder-tip pain. Any pain on opening her bowels. How many pads an hour, and are there large clots. How many weeks. Has she felt faint or been light-headed on standing. That's a triage script, and it maps directly onto the destinations.

Ben: And the reason to ask them in that order is that the first three are about ectopic, which is the thing you cannot afford to route wrongly, and only then do you get to the miscarriage questions. Our article's whole structure puts ectopic first for that reason: it isn't the likeliest answer, it's the one that changes what you do in the next ten minutes.

Sarah: And the gestation question does double duty now, which it didn't before June. It routes her, under six weeks or six and over. And it also decides the anti-D question later, because that's a gestation rule now rather than a management one. So the number of weeks is the single most useful fact in the whole call.

Ben: Ectopic questions first. Then weeks. Weeks decides two things now.

Sarah: And the follow-up appointment, which our article lists alongside acknowledging the loss and signposting support. It's easy to treat that as optional kindness. It isn't, because there are two clinical tasks attached: the pregnancy test at three weeks, and picking up whether she's coping.

Sarah: And it's the appointment where the recurrent miscarriage question gets asked properly. Three or more consecutive losses, and increasingly two or more, warrants referral for investigation. That's a history nobody takes in an emergency, and if the follow-up doesn't happen it may not be taken at all until she's lost a third.

Ben: The follow-up carries two clinical tasks, not just kindness.

Ben: Exam corner. A Rhesus-negative woman at ten weeks' gestation has a confirmed incomplete miscarriage and undergoes surgical management. What is the correct approach to anti-D immunoglobulin? A, give two hundred and fifty international units because she had surgical management. B, do not give anti-D. C, give anti-D and send a Kleihauer test. Or D, give anti-D only if the bleeding was heavy.

Ben: It's B. Since the June twenty twenty-six update, anti-D is not offered for miscarriage, threatened miscarriage or ectopic pregnancy up to and including eleven weeks and six days, and that now applies to both medical and surgical management. A is the old rule, and it's the single most likely thing to be got wrong here, because surgical management used to be exactly the trigger. C adds a Kleihauer, which our article says not to use in this first- trimester setting. And D invents a threshold that doesn't exist: the rule is gestation, not blood loss.

Sarah: So. Three things for Monday. One. Positive test plus pain is an ectopic until proven otherwise, a third have no risk factors, and a soft abdomen excludes nothing. Two. The anti-D question is now how many weeks, not what was done, and twelve weeks is the line. And three. Say the sentence about it not being her fault before she asks for it.

Sarah: One thing to reflect on, if you're logging this. Think about who in your practice makes sure the three-week pregnancy test actually happens. If the answer is nobody in particular, that's worth fixing. The full transcript and the references are on the episode page. Ben and I are synthetic voices. The medicine isn't. See you next week.

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