From working in reproductive health- the issue really is more that male fertility is affected by high temps, hence the boxers suggestions.
Big Poppy's 4th suggestion gets my vote- make the baby making fun! Bring home a couple of cute little Baby Biker onesies or bibs for her to get all excited about....
I'm wondering if your Beloved is nervous? Or perhaps worrying about your safety, but not able to voice it? We females can get a little tunnelvisioned when we've decided to attend to the biological clock...
I'm happy for you and your wife, Mike- Blessings to you both!


"Let your soul shine, It's better than sunshine, It's better than moonshine, ****** sure better than rain." -ABB