The short explanation
When a pregnancy test is positive but a scan does not show a pregnancy in the womb, there are three main possibilities: the pregnancy is too early to see yet, the pregnancy has ended, or it is growing outside the womb, usually in a fallopian tube. This last is an ectopic pregnancy. Doctors often call the situation a pregnancy of unknown location until it becomes clear. Repeat blood tests measure how the pregnancy hormone changes over a couple of days. The pattern, together with a repeat scan, usually shows which of the three it is. Waiting for these results is a normal and careful plan, as long as you know which symptoms mean you must come back immediately.
What depends on your situation
The parts of this that change from woman to woman. Uncertainty is stated, not hidden.
- Your dates matter. If ovulation happened later than you think, the pregnancy may simply be too small to see.
- Previous ectopic pregnancy, tubal surgery, pelvic infection, an IUD in place or fertility treatment make an ectopic pregnancy more likely, so mention any of these.
- An ectopic pregnancy cannot continue normally. If one is found, there are treatment options with medicine or surgery that your doctor will explain.
- Keep your phone charged and know how you would reach the hospital at night.
What this answer cannot determine
The boundary of online education. These need a clinician who can see you.
- This cannot tell you which possibility applies to you. Only the blood test pattern, a repeat scan and your clinician's assessment can show that.
Questions for your clinician
Take these with you. You can add any of them to an appointment card.
- What exactly are you looking for in the repeat blood test?
- What will happen if the results suggest an ectopic pregnancy?
- Which symptoms mean I should not wait for the next appointment?
- Is it safe for me to travel or work normally until then?
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 immediately if you get sudden severe belly pain, pain on one side, shoulder-tip pain, dizziness, fainting, or heavy bleeding. A ruptured ectopic pregnancy is an emergency.
Get help the same day
- Get care the same day if pain or bleeding starts or gets worse before your planned blood test.
Book an appointment soon
- Attend the repeat blood test and scan on the day you were given, even if you feel fine.
Sources
The evidence this explanation is built on.
- Ectopic pregnancy MedlinePlus (NIH)
- Ectopic pregnancy NHS
- Miscarriage MedlinePlus (NIH)
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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