Biochemical pregnancy
A very early pregnancy confirmed only by a positive hCG blood test that does not continue to a stage where it can be seen on ultrasound.
In plain English
It means the test picked up pregnancy hormone, but the pregnancy didn't carry on far enough to see anything on a scan.
Why it matters
It's a common and painful outcome after transfer, and it counts differently to a clinical pregnancy in success rate statistics.
Related terms
Guides that cover this
Written by patients, not clinicians. This page has not yet been reviewed by a named fertility professional, so it explains published guidance and points you to the original source instead of giving medical advice. It is not medical advice. Decisions about your treatment belong with your own clinic. Read our editorial policy and corrections policy.