Melbourne
FERTILITY experts admit they are baffled by the recent discovery of families
in which a tendency to sire twins is passed on from father to sons.
It’s a conundrum because there is no obvious mechanism by which sperm can
affect the number of babies a woman has. Usually twins are born because a woman
releases more than one egg at a time, or because a fertilised egg splits early
in development.
The families share the same surname so they may be related, team member Ken
McElreavey of the Pasteur Institute in Paris told a recent conference at the
Monash…
