Best supplements to boost Sperm count?

TtcMommyof1 • Wife to a wonderful man ❤️. Mommy to an amazing 6 year old girl 💕. Due 11/8 with a baby boy after 37m ttc💙
We think that my husbands sperm count is prohibiting us from conceiving, due to recent testosterone issues. We are having a fertility plan meeting with my OB if we haven't conceived by January (our dreaded 1 year mark). In the meantime, does anyone have suggestions of something he can take to naturally increase sperm? Thanks!