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Figure 2


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.