Get a sperm analysis if you have been on TRT long term, don't make assumptions

I've been on TRT mostly on for about 15 years, a few years off total in that time during that time but past four years straight. Been on doses from anywhere from 175 - 250 mg of test enth, cyp, or sustanon 250. Im currently on test cyp 175 mg. I had assumed after everything I had read I would likely have no sperm or at least very low sperm. I finally did a sperm analysis this week and I was honestly shocked, everything was average to above average except for volume which may have been a tad lower than average because I only waited 20 hours from last time I had sex till the test where they recommend 1-3 days. Motility was 70 and sperm concentrain per mL was 31 million while morphology was average. I'm mid 30s. I had read the reports here on reddit, studies and had assumed I would be infertile so I was shocked when I saw my results. Im not on hcg or anything else, just testosterone.