Fertility potential in patients with unilateral (UL) undescended testi
s is a debated topic. An experimental study was done in rats by surgic
ally creating a UL undescended testis and studying its effect on their
potential to father offspring when housed with female rats. No differ
ence in fertility potential was observed in the various groups in this
study. Since fertility was tested immediately after the rats became m
ature, it could be possible that fertility might decrease if the rats
were tested in later adulthood, We conclude that experimentally create
d UL undescended testis does not. cause damage sufficient to result in
infertility in young adult rats. Also discussed is the significance o
f this finding in relation to UL undescended testis in humans.