Laser systems have been an integral part of routine IVF laboratory work for many years. Developed by Dr Klaus Rink and taken to first clinical application in 1994 in collaboration withDr Alfred Senn, the Octax laser systems quickly found worldwide adoption. Applications of Octaxlaser systems include assisted hatching / assisted thinning, blastocyst collapsing, trophectoderm and blastomere biopsy and last but not least sperm viability testing. In 2000 Dr Markus Montag was the firstauthor who described laser-induced immobilisation of human sperm (1). In 2004 he further specified this application by describing the method of laser-assisted viability testing (2).