I'd like to chime in with my own endorsement for hCG. I recently did a cycle of PN's Pro Gear for four weeks and eight weeks of 4ad/1-androsterone. Because methylsten shut me down hard the last time I ran UD, and realizing it's a harsh DS that can zero out your test, I decided some hCG was appropriate.

Testicles stayed full, sex drive was good throughout and recovery during PCT has been a breeze thus far. No loss of sex drive or erectile ability after this cycle is a huge plus. For a few days after the last UD run, I couldn't keep function downstairs to save my life. hCG use has been a night and day difference. I ran it from week 1 at 250IU 2x weekly and gave the necessary clearing time before PCT. I'll never go without it again.