Table 3

The different sperm kinematic parameters recorded with computer aided semen analysis (CASA)

Parameter

Unit

Description


Motility

%

Total motility

Concentration

×106/ml

Number of spermatozoa

VCL

μm/s

Curvilinear velocity along actual swimming path

VSL

μm/s

Straight-line velocity along shortest path from start to end point

VAP

μm/s

Average path velocity based on every 5th frame of VCL path

LIN

%

Linearity of a curvilinear path, expressed as VSL/VCL

STR

%

Straightness, expressed as VSL/VAP

WOB

%

Wobble, expressed as VAP/VCL

ALH

μm

Amplitude of lateral head displacement

BCF

Hz

Beat cross frequency based on VCL crossing VAP per second


van der Horst et al. BMC Evolutionary Biology 2011 11:351   doi:10.1186/1471-2148-11-351

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