Select STR profiles comparing Differex™ with Erase using timed post-coital swabs. The times that the swabs were taken after sex are noted in the panels. The correct male genotype is: D8S1179 (13,15), D21S11 (29,31), D18S51 (12,20). The correct female genotype is: D8S1179 (12,13), D21S11 (29,30), D18S51 (12,13). Differex™ (Promega Corporation, Madison, WI, USA). Erase Sperm Isolation Kit (PTC Labs, Columbia, MO, USA).