<prompt> Which of the following findings characterize lower reference limits in a normal semen sample?Volume 2mlSperm concentration of 40 million per mL30 normal sperm morphology32 progressive sperm motility  <response>: The WHO Semen parameters are as follows: Parameter Lower Reference Limit Semen volume ml 1.5 Sperm concentration 106ml 15 Total sperm number 106ejeculate 39 Progressive motility PR, 32 Total motility PRNP, 40 Vitality live sperms, 58 Sperm morphology NF, 4 pH 7.2 Leucocyete 106ml 1 MARImmunobead test 50 