Question!!

Brandi
So my husband works road construction and long story short we having been trying since September. We got pregnant in February with it being his off season and unfortunately miscarried in April. I did have a D&C performed at the end of April and had my first normal cycle about 4 weeks later in May. Could it be possible that during the work season my husbands sperm count could be low due to working in the heat?
Thanks for any input!