"According
to a report in the American Journal of Pathology, August 1980, pp
497-511, cancer researchers injected a number of pregnant rats
with DMBA, a cancer-causing substance. They then aborted
half the rats; the other half were allowed to carry their
pregnancies to term. Among the
aborted rats, 77% developed breast cancer. Among the term
rats, only 5.5% developed breast cancer."
(carrying full term was
actually cancer protective for the rats!)
See dramatic increase in breast
cancer since 1973 when abortion was legalized