I should like to review very briefly the various kinds of genetic damage that might be expected to occur from chemical mutagens, the time delay before such effects might be manifest, and something of the kind of impact that these might be expected to have on human well-being. I hardly need to add that this is an area where we know very little; we know enough to be apprehensive, but not enough t...

Objective To verify the hypothesis that the incidence of chromosomal abnormalities increases in babies conceived by different assisted reproduction procedures. The availability of the umbilical cord blood encouraged us to study this hypothesis via this method. MaterialsAndMethods This is a descriptive study, umbilical cord blood samples of assisted reproductive technology (ART) children were an...

Abstract Absences pose a dilemma for theories of causation. Allowing them to be causes seems make too permissive. Banning from being restrictive. An increasingly popular approach this is acknowledge that norms can affect which absences count as causes. In article, I distinguish between two influential implementations such ‘abnormality’ approaches and argue so-called ‘double-prevention mechanism...