a) The doctor in this case is facing a conflict between the wife's interest of keeping her family history secret to save her marriage vs the principles of non-maleficence and beneficence; to do the best for the upcoming baby.
b) To solve this dilemma, we should ask ourselves 5 ques to know whether the action is ethical or not: - What benefit and what harm will this action produce? - Does it advance the common good? - Does it treat everyone the same? - Does this action violate any of the moral rights of the affected parties? - Is this action consistent with the moral virtues? The ethical action is the one that best fits with these 5 approaches.