Gonadorelin

What it is

Gonadorelin is synthetic GnRH, a 10-amino-acid hormone identical to the one your brain uses to run your entire reproductive system. Its structure was worked out in the early 1970s, work that earned a Nobel Prize. It sits at the very top of the reproductive hormone chain, telling the pituitary to release LH and FSH, which then drive the testes or ovaries to make sex hormones.

How it works

It tickles the GnRH receptor in the pituitary, sparking a release of LH and FSH that cascades down to testosterone and estrogen production. Every sex hormone signal starts here. Its catch: a half-life of just two to four minutes, so the body normally pulses it, a rhythm a routine injection cannot match.

What people report

• ✦Proven for its original uses: diagnostic pituitary testing and inducing ovulation in certain types of infertility
• ✦In TRT clinics it is used to help preserve testicular function, often as an alternative when HCG supply is tight
• ✦Acting high up the axis, it may preserve the full reproductive pathway rather than just the testicular receptor
• ✦Cheap compared with HCG's recurring availability problems

Typical use

In fertility care it was historically delivered by a pulsatile pump to mimic the body's rhythm. In TRT clinics it is typically injected a few times a week, a schedule that cannot match the physiological pulse.

Dosing reference

Historical human products used defined doses, but most current US use is compounding off-label. Its two-to-four-minute half-life fights the occasional-injection approach. Verify any protocol, and note that its old approvals do not mean current compounding clearance.

Reference only — not a recommendation. Verify via primary sources.

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