My wife works as auditor during the night (11pm- 7pm 40 hours a week). It's has been really hard on her since she got pregnant, because of the hours and the lack of sleep during the day. She as well claims she needs to drink at least a cup of coffee a night in order to stay awake, which I believe can't be good for the baby since she is only 7 weeks pregnant. I have read that pregnant women who work night shift should never work full time, is that true? Can coffee really harm the baby? Is she now more prone to have a miscarriage? I am just concerned about the health of my wife and baby.