Brother. Keep in mind that Pregnyl is actually made for woman who try to get pregnant. They take it in one single shot.
In case for bodybuilders, it needs to be take in small dosage, depending if it’s a PCT or taken during the cycle.
But for that, you need first to get your hand on empty sterile vials (and maybe also bacteriostatic water). So you can do your mix, then put into the vial.

We have many experienced bodybuilders on this forums, don’t hesitate to ask next time for whatever.

Don’t forget, there is no stupid question, the only stupid question is the one without an answer