Fever/hot baths effect sperm?

So my husband was sick yesterday, and was running a fever of 99.6. So it wasn't to high, but since he wasn't feeling good he got in the bath 3 or 4 times something he never does. I heard this can cause an unhealthy pregnancy. Does anyone know if this is true? AF started today and I just want to know if I should take the next few months off?