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. 1998 Nov 10;95(23):13612–13617. doi: 10.1073/pnas.95.23.13612

Table 1.

Sperm count and motility

+/+ −/−
Spermatozoa/mouse 5.6 × 106 3.6 × 106
Motility, % moving spermatozoa 62 47
Aberrant structure, % 18 47

Sperm cells were collected from the epididymis and counted with an hemocytometer. Aberrant sperm cells had abnormal and bent tails with cytoplasmic droplets. Sperm motility was assessed by using a microscope connected to a video camera.