Threatened Miscarriage: Complete Guide
Hearing the words "threatened miscarriage" is frightening, but it's a specific medical term with a specific meaning — and it isn't the same as an actual pregnancy loss. It describes bleeding, with or without cramping, in early pregnancy where a scan shows the cervix is still closed and a heartbeat is present. Understanding what it does and doesn't mean can make a worrying wait more manageable.
What a threatened miscarriage actually means
The diagnosis is based on specific findings, not just the presence of bleeding:
- Vaginal bleeding, which can range from light spotting to something heavier, sometimes with cramping similar to period pain
- The cervix is closed on examination, meaning the pregnancy hasn't started to be expelled
- A scan shows a baby with a detectable heartbeat, confirming the pregnancy is still viable at that point
- The bleeding is a warning sign that miscarriage is possible, not a confirmation that it will happen
It's genuinely common — bleeding in the first trimester affects a significant number of pregnancies, and many of these continue perfectly normally through to term.
What tends to happen next
If you experience bleeding, your early pregnancy unit (EPU) will usually want to see you for an assessment:
- A transvaginal ultrasound scan checks for a heartbeat and confirms the pregnancy's location and stage
- Blood tests measuring hCG levels may be used, particularly if it's too early to see a heartbeat clearly on scan
- If everything looks reassuring, you'll typically be advised to rest, avoid heavy lifting and strenuous exercise, and avoid sex until the bleeding has settled
- You may be offered a follow-up scan a week or two later if there's any uncertainty, or if bleeding continues
- There's no specific medical treatment that stops a threatened miscarriage — the outcome depends on how the pregnancy itself is developing
When to seek urgent help
Contact your EPU, midwife, or NHS 111 (or go to A&E out of hours) if you experience:
- Heavy bleeding that soaks through a pad within an hour
- Severe abdominal pain, especially if it's one-sided
- Passing clots or tissue
- Fever, dizziness, or feeling unwell alongside the bleeding
- Any bleeding accompanied by shoulder-tip pain, which can (rarely) indicate an ectopic pregnancy and needs prompt assessment
Frequently Asked Questions
Does a threatened miscarriage mean I'll definitely lose the baby?
No — it means bleeding has occurred but the cervix remains closed and a heartbeat has been seen, which are both reassuring signs. A large proportion of threatened miscarriages resolve, and the pregnancy continues without further problems. The term sounds alarming, but the prognosis after a confirmed heartbeat is generally good.
What should I do if I start bleeding in early pregnancy?
Contact your midwife, GP, or local early pregnancy unit for advice, as they'll want to assess you and likely arrange a scan. In the meantime, resting and avoiding strenuous activity is sensible, though there's no proven way to "stop" a genuine miscarriage from progressing if that's what's happening. Seek urgent care for heavy bleeding, severe pain, or feeling unwell.
Can I keep working or exercising after a threatened miscarriage diagnosis?
Most units advise a period of rest and avoiding heavy lifting or strenuous exercise until bleeding settles, though this varies by individual circumstances. Gentle daily activity is usually fine once you've been reassured by a scan, and your midwife can give tailored advice for your situation. Always follow the specific guidance given by the clinician who assessed you.
This article is for informational purposes only and does not constitute medical advice.
Related articles: