SIRy-Mr. W. L. Whitehouse (21 June, p. 759), like myself' and many others, again calls attention to the potential dangers of rhesus isoimmunization in therapeutic abortion. He asks that the extent of this problem be further and scientifically investigated. There are, in fact, one or two further facets to be considered. Firstly, all of us are aware of the numbers of women whose first continuing ...
