kurzrock–miller test kurzrock–miller test the kurzrock–miller test is an in-vitro test of sperm–mucus interaction. it consists of establishing an interface between cervical mucus and liquefied semen. it is one of the tests used for investigating infertility. kurzrock-miller in-vitro slide test of sperm-mucus interaction. etymology the test is named after raphael kurzrock and thomas grier miller. interpretation negative test: spermatozoa congregate on semen side of the interface, but do not penetrate it. abnormal: spermatozoa penetrate the mucus, but rapidly become immobile or acquire shaking movement. poor: after penetration, spermatozoa do not progress farther than 500 μm. normal: spermatozoa penetrate the mucus and >90% are motile with definite progression, crossing 3 cm at 30 minutes.