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Sperm morphometry: a tool for detecting biophysical changes associated with viability in cryopreserved bovine spermatozoa
Author(s) -
GarcíaHerreros M.,
Leal C. L. V.
Publication year - 2014
Publication title -
andrologia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.633
H-Index - 59
eISSN - 1439-0272
pISSN - 0303-4569
DOI - 10.1111/and.12141
Subject(s) - sperm , andrology , cryopreservation , biology , percoll , semen , anatomy , embryo , genetics , in vitro , medicine
Summary The aim of this study was to determine whether computerised sperm head morphometric analysis can be used as a diagnostic tool for detecting biophysical changes associated with sperm viability in frozen–thawed bovine spermatozoa. Ejaculates from five bulls (4 ejaculates/bull) were pooled and processed for computerised morphometric analysis, and SYBR ‐14 green/ethidium homodimer‐1 fluorescence‐based live/dead viability assay was used simultaneously to confirm the viability index of frozen–thawed spermatozoa. Sperm samples were assigned to three experimental groups. The first group was enriched in live spermatozoa (after a double P ercoll selection), the second group was enriched in dead spermatozoa (after a refreeze–thaw procedure), and the last group was a 50 : 50 pool of live/dead spermatozoa (from first and second group samples). There were significant differences ( P < 0.001) related to sperm morphometric dimensional parameters among the three groups analysed, being the lowest overall sperm head dimension found in the second (dead spermatozoa) group. In conclusion, sperm head morphometry can be used as a potential diagnostic tool for detecting biophysical changes associated with sperm viability in frozen–thawed bovine spermatozoa.