The short explanation
Practice varies. Some guidelines define recurrent miscarriage as three or more losses, while others start investigations after two, especially for women over 35 or those who have had trouble conceiving. It is reasonable for your sister to ask her doctor about testing after two losses. Even after two miscarriages, the chance of a healthy next pregnancy is still good for most women, which is worth knowing.
What depends on your situation
The parts of this that change from woman to woman. Uncertainty is stated, not hidden.
- Investigations may include blood tests for antiphospholipid antibodies and thyroid function, a scan of the womb's shape, and sometimes genetic testing.
- Whether tissue from a miscarriage was tested can help explain a loss.
- Grief after miscarriage is often underestimated by families. Her partner's support and yours can matter a lot. She can ask for early scans and support in her next pregnancy.
What this answer cannot determine
The boundary of online education. These need a clinician who can see you.
- This answer cannot tell why your sister's pregnancies ended or whether tests will find a cause. Her doctor will advise based on her history.
Questions for your clinician
Take these with you. You can add any of them to an appointment card.
- Would you recommend tests after two miscarriages in my case?
- Which tests are useful, and which are not?
- What care will I get in my next pregnancy?
- Is there support or counselling available?
When to seek help
Clinician-approved guidance for this topic. When in doubt, being seen is never the wrong choice.
Emergency — call 112 now
- Call 112 or go to the nearest emergency department if you have a positive pregnancy test with severe pain on one side of the lower belly, pain in the shoulder tip, heavy bleeding, or you feel faint or collapse.
Get help the same day
- She should contact her doctor the same day if she is pregnant and has bleeding or cramping.
Raise it at a routine appointment
- She can book a routine visit to discuss testing before trying again.
Sources
The evidence this explanation is built on.
- Miscarriage NHS
- Miscarriage MedlinePlus (NIH)
- Infertility NHS
Who wrote and reviewed this
Every AskHer answer names its author. A clinically reviewed answer also names the clinician who signed it off — if no clinician is named below, it has not been clinically reviewed.
- Author
- AskHer Editorial (AI-assisted draft) AskHer's editorial team — not an individual clinician Works in English, தமிழ், हिन्दी
- Clinical reviewer
- Nobody yet No clinician has signed this answer off, and no person on the editorial team has read it yet. That is what the “Written with AI assistance” label means. It is queued for an editor to read, and then for a clinician who works in this area. The sources it was drafted against are listed above.
- Review status
- Written with AI assistance — not yet reviewed by a person
- Last reviewed
- Not yet reviewed by a person
- Version
- 1
Correction history
Substantive changes are listed, not quietly edited away.
No corrections have been made since this answer was first published.
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