pgf2a is proglastins that are used in female livestock to induce labor.
if used in regular muscle tissue, it will make the muscle swell, some argue it will grow without working out, and you get huge pumps.
with it, you also get a sore dry throat, you get cold lips, itchy skin, sweats, you feel like you will puke, and for 2 hours you shit everything in your system out.
if that sound like good stuff, then do a search for more.