There's no right or wrong answer with this. We've seen good luck with all different levels of cycling and it may be something that is different to each individual. Too much can really cut odds of conception, and that's already what a lot of people are doing and having success with it, so my inclination would be to just have him keep doing what he's comfy with. It's been awhile since you conceived, so even if he was biking about the same amount then, you may have a totally different result in terms of sperm health and sway this time thru.