evl-24 was identified in screens for mutations that result in abnormal vulval eversion, the process whereby an opening is made from the uterus through the vulva to the outside of the hermaphrodite; the evl-24 mutation results in sterile animals with an everted vulva that have failed to undergo vulval invagination at the L4 stage, have no uterine cavity or oocytes, and display an abnormal distal germline.