In a short but lively article, the authors present a phenomenon seen frequently in analytic practice but infrequently reported. Four fathers developed emotional illness related to their wives' pregnancies. In each case, the father had significant conflict going back to his own mother's being pregnant with a sibling. In these four cases the overshadowing trauma concerned sibling rage and rivalry, rather than envy of the wife's childbearing capacity, dependence on the wife, and/or neurotic conflict with the oedipal father.