Testosterone Injections

So, my husband goes to the gym regularly and occasionally buys testosterone to inject in his body. He'll usually inject it 2 times a week, for 8 weeks or so. I've read that this can act as a birth control for men because it lowers sperm count. We've been trying for baby #2, and he just bought testosterone to start this week! I'm livid and we've been arguing a lot about it. Has anyone else had experience with this?Has anyone conceived while their husband or boyfriend was doing testosterone injections?