Permutation, an old french comic.
Two lesbian scientists capture other womens to test out the machine which would finally make them mens, but an earthquake happen just when they finally succeeded making the machine work on a captured student.
http://imgur.com/a/jRtXi#0
Beware, it's quite old, and intended as an arousing soft porn / guro comic, so called "bd de gare" so not really up to date with nowadays LBGT. It make no differences between lesbians and transexuals. The woman turned man instantly switch gender as well, and act as a sexist macho as if he'd never been a woman.