No sperm in semen analysis, but got pregnant

Erica

This might be a complete shot in the dark. My husband has gotten me pregnant four times with one live birth. I recently had a loss back in October. We struggled with male infertility. He’s currently on clomid to increase his sperm count . My husband just had a semen analysis done a week ago and it came back with zero sperm. I’m just a little confused, anyone have any insight on this?