Table 1 Recalculated measurements of sperm tail motility by confocal imaging

Sperm I.D	Number of flagella motility in image (n)	The length of Y axis in sperm movement (b, µm)	Movement of sperm tail(N, number/sec)
1	9	34.8	14.25
2	14	38.6	20.01
3	3	40.2	4.12

The measurement of the total Y lengths of the image (a) and sperm tail (b) are illustrated in Fig. 1A. The flagellar activity of the sperm cell with I.D. 1 was recalculated and shown to have normal activity. Representative results from fast-moving (I.D. 2) and slow-moving (I.D. 3) sperms are also shown. I.D., identification number.