I'm a nurse and have worked 12hr days and nights for several years and always have worked more nights than days. I hate nights but definitely hard to avoid them being a nurse. I have never been able to just shake them off and tend to feel 'hung over' , like my head is heavy and cloudy, for a couple days after a stretch... anyways, I have 2 beautiful boys so you definitely still have a good chance. Good to know though that if and when I TTC again that my work and it's crappy shifts might sway pink even if just a little bit :o