In my 30+ years of sailing, I've encountered all sorts of challenging conditions; gales, dead-calms, dense fog, even sailing the BVI with my wife who was 8-months pregnant at the time. Through all, I could probably relate some good thing that emerged from the experience. But, unless I had absolutely no choice, I couldn't think of any good reason to have an infant on board a pleasure cruise. Look at it from this perspective, the stress and tension to which you'll likely be exposed, as a result of constant concern for the child's welfare, would almost certainly put a damper on any pleasure that you hope to experience. Better to disappoint your son than ruin a vacation and deal with the aftermath. PJ