The short term fate of dischargeable glass beads implanted surgically in the mouse urinary bladder.

Although both male and female mice of different ages expelled surgically implanted glass beads with diameters of 1 mm and 0.5 mm within 5 weeks in comparable numbers, urinary stones formed in relation to these implanted beads more frequently in male mice than in females. This stone formation in male mice may be a consequence of the relatively high mucoprotein content in the urine of the male mouse.