Embryo glue
A transfer medium containing hyaluronan, used to load the embryo into the catheter before transfer, marketed as helping the embryo attach to the womb lining.
In plain English
It's a thicker fluid some clinics use to help move the embryo into the womb during transfer, said to help it stick.
Why it matters
The HFEA rates this as an add-on with limited evidence of improving live birth rates for most patients, so it's worth asking about the evidence before paying extra.
Related terms
Guides that cover this
Sources
- Treatment add-ons with limited evidence, HFEA. Link checked 17 September 2026.
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.