passages.id: split_4_validation_838_passage
passages.type: progene_text
passages.text: The mean percentage of spermatozoa with intact acrosomes in the subnormal group was 77.0 +/- 7.2 % before freezing and decreased significantly ( P < 0.001 ) after thawing : to 63.7 +/- 8.2 % with the use of HSPM and 66.8 +/- 8.7 % with the use of TYB .