I recently paid a visit to my Doctor to get solution to some health challenges i am battling with.

On his recommendation, that i should provide body fluid (spermatozoa) for lab analysis. But I am not married, I had no option than to masturbate.

The question is,; Did i sin?

The line between what's a sin and what's not as been blurred out by science. And masturbating for the purpose of medical diagnosis can never be seen.
The children of God would soon show up and start talking nonsense about going to hell