Cetrorelix
Cetrorelix is a GnRH antagonist medication used in assisted reproductive technology (ART) procedures such as IVF. It works by temporarily suppressing the body's natural hormone signals to prevent premature ovulation, allowing fertility specialists to better control the timing of egg release during controlled ovarian stimulation cycles.
Cetrorelix is a hormone-suppressing injection used during fertility treatments to prevent early ovulation.
Key facts at a glance
- ATC
- H01CC02
- RxNorm
- 68147
- Generic
- Cetrorelix
- Class
- atc-h01
- Brands
- Cetrotide
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- injection
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Cetrorelix is primarily used to prevent premature luteinizing hormone (LH) surges in women undergoing controlled ovarian stimulation for assisted reproduction techniques such as in vitro fertilization (IVF) or intracytoplasmic sperm injection (ICSI).
As a GnRH antagonist, Cetrorelix blocks GnRH receptors in the pituitary gland, rapidly suppressing the release of LH and FSH. This prevents the mid-cycle LH surge that would otherwise trigger ovulation before the eggs are ready for retrieval.
Cetrorelix is administered as a subcutaneous injection, typically in the abdomen. It is usually given in the mid-to-late follicular phase of the treatment cycle. Common side effects may include injection site reactions, headache, or abdominal discomfort. It should only be used under specialist supervision as part of a monitored fertility treatment protocol.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy