prepping DH for ttcing (sperm issues)

[pushmug7]

since DH had his SA about 4.5 yrs ago , results were borderline(cant remember numbers) and since having DD 4 yrs ago we used pull out method , i never took any kind of birthcontrol since trying for DD ..so im guessing we have low sperm issues since we dint get pregnant accidently.
i wanted to ask did anyone use maca for sperm????any success with it??
DH is currently on l-arginine , zinc, selenium , vit e, c , a , royal jelly etc.