Where is it legal to donate your testicle?

In most countries, the legal framework surrounding testicle donation is quite restrictive. In the United States, for example, sperm donation is regulated, but testicle donation specifically is not a common practice and is typically not legal or ethical due to concerns about health and consent. Some countries may have more lenient regulations, but such procedures are rare and often discouraged. Always consult local laws and medical ethics guidelines for the most accurate information.