This page explains how Cetrotide (cetrorelix) is used in IVF treatment. All information is educational. Talk to your doctor about your specific protocol and any questions or concerns about your medications.
Overview
| Brand name | Cetrotide |
|---|---|
| Generic name | cetrorelix |
| Category | GnRH Antagonist |
| How it is given | subcutaneous injection |
| Common dosages | 0.25 mg daily, 3 mg single-dose |
| Typical timing | Usually starts around day 5 to 6 of stimulation, once follicles reach a certain size |
What to expect: common side effects
Side effects vary from person to person. Many people experience only mild effects while others find them more significant. All of these experiences are valid. Report any severe or unexpected symptoms to your care team right away.
- Injection site redness or swelling
- Nausea
- Headache
- Fatigue
- Hot flashes (less common than with GnRH agonists)
Storage instructions
Store in the refrigerator between 2C and 8C (36F to 46F). Do not freeze. Keep in the original package to protect from light. Assemble the syringe just before injection and use immediately.
Traveling with Cetrotide
Pack in a cool bag with ice packs. Cetrotide is allowed as a medical necessity through airport security. Carry your prescription and keep the medication in your carry-on bag. The powder vials are stable at room temperature for short periods, so brief travel is manageable.
Tips from the IVF community
These are practical suggestions shared by people who have been through IVF. They are not a substitute for your clinic's guidance.
- Cetrotide prevents premature ovulation, so timing is important. Take it at the same time each day.
- The injection is quick and most people find it less painful than gonadotropins
- Some clinics switch from a GnRH agonist (like Lupron) to a GnRH antagonist protocol (like Cetrotide) for poor responders or PCOS patients
- Log each dose in TrackMyIVF, including the time, as your doctor may ask
- Tell your doctor about any sudden severe abdominal pain
Track this medication with TrackMyIVF
Set dose reminders, log side effects, and share your medication timeline with your care team. TrackMyIVF keeps everything in one place so you never miss a dose.
Learn about TrackMyIVFFrequently Asked Questions
What does Cetrotide do in an IVF cycle?
Cetrotide is a GnRH antagonist that blocks the natural surge of LH that would trigger premature ovulation. Without it, your follicles might release eggs before your retrieval is scheduled. Cetrotide keeps your eggs safely in place until your doctor decides the timing is right for your trigger shot.
When do I start taking Cetrotide?
Most antagonist protocols begin Cetrotide around stimulation day 5 or 6, or when your lead follicle reaches a certain size (often around 14mm). Your doctor will give you specific instructions based on your monitoring results.
Can I take Cetrotide at a different time each day?
It is best to take Cetrotide at the same time each day. If you miss your window, contact your clinic. Do not double up without guidance.
What is the difference between Cetrotide and Lupron?
Lupron is a GnRH agonist that first stimulates and then suppresses hormone production. Cetrotide and Ganirelix are GnRH antagonists that block receptors directly and work faster. Antagonist protocols (using Cetrotide) are often shorter and used for patients at risk of OHSS, while agonist protocols (using Lupron) are more traditional. Your doctor recommends the approach best suited to your history.
Medical disclaimer: This page provides general educational information only. It is not medical advice and should not replace guidance from your doctor, nurse, or reproductive endocrinologist. Every person's treatment is unique. Always consult your care team before making any decisions about your medications or treatment plan.
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About the author
Viv
BSc, Patient Advocate
Founder, TrackMyIVF
I built TrackMyIVF because I needed it during my own journey. Every feature comes from real experience.