(Downloading may take up to 30 seconds.
If the slide opens in your browser, select File -> Save As to save it.)
Click on image to view larger version.

Fig. 2. Schematic of highly motile (A) and bulk (B) sperm in the migration channel.
(A) The situation immediately after sperm injection in the sperm chamber.
After
1.5–3 min, the bulk of spermatozoa appear in the migration
channel (B). The highly motile sperm shown in A move forward and go out of the
focus view by the time bulk sperm appear in the migration channel.