Table 3. Sperm motility and viability before and after each freezing/thawing cycle.

	Motility (%)									Viability (%)
Subject	Freezing/thawing cycle no.									Freezing/thawing cycle no.
No.	0	1	2	3	4	5	6	7	8	0	1	2	3	4	5	6	7	8
1	88	75	50	30	20	12	7	3	0	90	85	62	41	28	22	14	10	8
2.	80	55	50	34	16	5	0	—	—	82	63	53	36	21	17	3	—	—
3.	84	54	52	15	13	4	2	0	—	87	61	54	36	22	12	8	2	—
4.	92	55	41	20	10	0	—	—	—	92	55	41	20	10	0	—	—	—
5.	80	72	55	32	16	1	0	—	—	88	80	61	42	25	12	3	—	—
6.	85	70	40	20	15	10	6	2	0	90	69	51	36	30	18	12	8	4
7.	80	68	58	21	11	6	1	0	—	85	70	59	34	24	10	9	4	—
8.	85	70	35	16	10	3	1	0	—	90	72	36	28	22	18	10	3	—
9.	80	50	40	36	13	2	0	—	—	85	60	44	40	18	3	2	—	—
10.	81	70	40	24	14	8	4	2	0	85	72	47	32	20	12	9	5	3
Mean±s.d.	83±4	64±9	46±8	25±8	14±3	5±4	2±3	1±1	0	87±3	69±9	51±9	35±7	22±6	12±7	8±4	5±3	5±2