Treatment add-ons
Freeze-all can be medically recommended in some situations, such as high OHSS risk. Offering it routinely to everyone as a way to improve success is treated as an add-on. The HFEA reviews the evidence for add-ons and publishes a rating for each; see the HFEA add-ons page for the current rating, as evidence can change.
Also known as: routine freeze-all
Related United Kingdom guides
Last reviewed: 23 September 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.