Preserving Sperm

Re “Bioethics at Center Stage,” editorial, June 23:

I am extremely disturbed by the implications of Ralph Brinster’s discovery of “biological immortality.” One, because eternal storing of male sperm of endangered species may mean the ability to restore almost-extinct animals in the future, but where will we put them when their habitat will have long been usurped by us humans?

Two, if this technique is used to “immortalize” humans, it will be the sperm of males. Are females not carriers of “superior” eggs? Will only male traits be thus preserved? And what about the already appalling problem of human overpopulation? The male arrogance of our species makes me shudder and induces vomiting.

RACHEL ROSENTHAL

Los Angeles