On TRT. Last sperm count was 7 million with an active 6%. Normal is 60 million with active 15%

i'll give my trt some more time, but ultimately i would like to get sperm down to nothing.

I would just get a vas, but there is apparently debate of autoimmunity with "backing up" of sperm into the blood. Apparently there is a rise in a certain antibody that attacks the sperm and since that DNA is the same as yours the antibody can act anywhere.

So my goal is to lower sperm as much as possible hormonaly, and THEN get a vas, as that may minimize this antibody reaction. Tho it might not matter because even a little might be enough.
Anyway, deca is highly suppressive as we all know, becaause it is a progestin. Also progesterone itself is sometimes used by doctors in male contraception. No one locally near me will do this though. A dingle dose of deca can bring down tesosterone in 2 days completely, so the contraceptive effect is likely similar. So between deca and progestrone long term what would be better, and how small a dose could i get away with do you think. I feel deca could be as modest as 25mg a week and would probably have significant sperm reduction in 2-4 weeks. Progesterone im cautious might cause more sides with less suppression. Im not estrogen sensative at all, but never used a progestin of any type.
Also dont want to lower my sex drive. Perhaps intermittent use of deca or npp, or progesterone can be just as effective. Say every three months stay do a shot of deca, or add progesterone for a few weeks.
Thoughts? Would 25 mgs a week of deca hurt sex drive? i do test 100mg a week