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Fertility Glossary

Treatment add-on

An optional extra offered alongside standard treatment, often at extra cost.

IVF & IUI

Add-ons are optional extras such as assisted hatching, embryo glue, endometrial scratch, time-lapse imaging or immune therapies. Evidence that they improve live birth rates for most patients is limited or absent for many of them. Ask what the evidence is for your specific situation, what it costs, and what happens if you decline — declining should never affect the rest of your care.

Also known as: add on, optional extra, IVF add-ons

Sources

  • ESHRE guidelines and patient information
  • Cochrane systematic reviews

Last reviewed: 8 September 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.

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