No, babies are born pretty much exactly three days after the baby is 'made' - give or take a couple of minutes. I tend to 'try for baby' in the midday or early afternoon so the mother can sleep well, eat and shower etc before the baby comes. Also, it's really annoying if the baby's born at night because all the rest of the family ( husband, children etc.) wake up screaming and get no sleep which really messes up work and school the next day etc.