Fertility Glossary

Buserelin

A GnRH agonist used for down-regulation or as a trigger.

Medicines

Buserelin (for example Suprecur) is given by injection or nasal spray depending on the product. Your clinic's protocol and the product leaflet always take priority.

Also known as: Suprecur, Suprefact

Related United Kingdom guides

Buserelin in IVF: Down-Regulation and Trigger Injections Explained
Buserelin: What It Is and Where It Fits in Fertility Treatment

Sources

NHS — IVF
HFEA — Treatments

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.

Related terms

GnRH Agonist

A medicine that mimics GnRH, used to suppress the natural cycle or to trigger egg maturation.

Down-Regulation

Temporarily switching off the natural hormone cycle before IVF stimulation.

GnRH agonist trigger

A trigger using a GnRH agonist instead of hCG, often to reduce OHSS risk.

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