bath tub and sperm quality

[VTBaby]

I am getting close to my fertile period and DH had a headache but wanted to BD so he took a hot bath to make himself feel better Does anyone know how long this one bath will affect his sperm? He feels terrible and I am worried

 

[lisap2008]

A really hot bath can make the sperm swim slower temporarily , but I wouldn't stress out about it unless its a nightly thing.