r0005">How the menstrual cycle affects the forensic analysis of rapes was studied.
r0010">Victims were grouped according to the menstrual cycle phase at the time of rape.
r0015">Groups did not differ on the probability to recover spermatozoa.
r0020">Groups did not differ on the probability to amplify suspect's STR profiles.
r0025">The menstrual cycle phase does not affect the forensic investigation of rapes.