Parameters

Parameter description

unit

Motility

Percentage of sperm in different motility group based on velocity and progression

%

Concentration

Number of spermatozoa per milliliter

×106 mL−1

VAP

Average path velocity based on every 11th frame of VCL path

μms−1

VSL

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

μms−1

VCL

Curvilinear velocity along actual swimming path

μms−1

ALH

Amplitude of lateral head displacement

μms−1

BCF

Beat cross frequency based on VCL crossing VAP per second

Hz

STR

Straightness, expressed as VSL/VAP

%

LIN

Linearity of a curvilinear path, expressed as VSL/VCL

%