Ttc and husband hates the pressure

We have been Ttc  for awhile now. We are both on same wanting second baby. when it comes to the critical window of fertile and ovulation he hates the pressure. Like I zap the fun out of it. With first there was no effort we decided we wanted kids and were pregnant that day. Have tried different approaches :not mentioning it, and being casual about it. Not sure what else to do.