Is there a direct correlation between low semen volume while on cycle and HPTA shutdown? The reason I am asking is that I always get very low semen volume while on (I have heard this is normal) and I was wondering if I could use it as a cue to determine when to start HCG. I have only been back on for 6 days, but already volume is down. I was going to wait until 2 weeks to start HCG. Should I just start now?