Hi Kezzy. My DH is a pilot so his roster changed month to month. When we are TTC it gets very frustrating when is going to be a way at the right time. However a week is not that long and there is a chance if you O in the middle of that week that if you DTD when he goes and when get gets back that you will fall. I think it just means that you have more of a chance of a girl. We have 2 girls and 1 boy and the boy baby was the only time DH has been home at the right time. So yes there is a good chance that DH working away still means you will fall!