Jim Neel [stamped, JUL 21 1979] Sibling Incest Jim -- There might be some public service to respond to this, and the better from your informed perspective (I think of your 1967 paper in Pediatrics) I would have said (1) the tabu [sic] will do even more damage than homozygosity (2) See your neighborhood counsellor [sic]! (Entre nous, do you think abortion is indicated on genetic grounds? What is your risk estimate?) Josh.