Cetrorelix vs Lutropin alfa
Head-to-head comparison of Cetrorelix (Cetrorelix acetate) and Lutropin alfa (Recombinant Human Luteinizing Hormone Alfa) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Cetrorelix | Lutropin alfa |
|---|---|---|
| Category | Sexual Health | Sexual Health |
| Full Name | Cetrorelix acetate | Recombinant Human Luteinizing Hormone Alfa |
| Molecular Weight | 1431.06 Da | 30,000 Da |
| Half-Life | ~30 hours | ~10-12 hours |
| Amino Acids | 10 | N/A |
| Typical Dose | 0.25 mg SC daily | 75-150 IU per dose |
| Route | Subcutaneous | Subcutaneous/Intramuscular |
| Purity | ≥98% | ≥98% |
| Studies Count | 300 | 420 |
| Research Status | Clinical | Clinical |
Cetrorelix Benefits
- ✓prevents premature ovulation
- ✓supports IVF cycle control
- ✓blocks LH surge
- ✓short-acting pituitary suppression
Lutropin alfa Benefits
- ✓stimulates Leydig cells
- ✓raises endogenous testosterone
- ✓supports testicular steroidogenesis
- ✓pairs with FSH for fertility
Cetrorelix Dosing
0.25 mg SC daily|start on stimulation day 5-6|protocol-dependent antagonist cycle
Lutropin alfa Dosing
75-150 IU SC/IM 2-3x weekly|adjust to testosterone response|combine with FSH when spermatogenesis support is needed
Cetrorelix Side Effects
- ⚠injection-site reactions
- ⚠headache
- ⚠nausea
Lutropin alfa Side Effects
- ⚠injection-site reactions
- ⚠headache
- ⚠hormonal swings
Research Overview
Cetrorelix
Cetrorelix is a cornerstone GnRH antagonist in assisted reproduction, with a fast onset and reversible suppression of LH. Trials show it improves cycle management by reducing premature ovulation during stimulation.
Lutropin alfa
Lutropin alfa has been evaluated in fertility protocols to restore LH signaling and endogenous testosterone production. It is a direct research/clinical analogue for men with low gonadotropin drive.
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