My DH works 7on 7off (days and/or nights) and we can go a week without even seeing each other. So sometimes we can miss a whole 'window of opportunity' for the month. It can also make it really hard to schedule appointments, because it's not like he can just have a morning off to see the FS. Thankfully he has a boss who went through IVF too and it makes it easier to explain why he CAN'T do overtime etc.
When you think about it there are lots of jobs out there that need shift workers, and travelling etc, so i don't think we are alone. Keep smiling