Functional evaluation of sperm in Colombian fertile men.

OBJECTIVE: The aim of the present study was to evaluate in 111 ejaculates from fertile men membrane integrity of spermatozoa before selection and sperm motility, and sperm concentration and chromatin integrity before and after selection of motile spermatozoo. METHODS: We evaluated the membrane integrity (using hypoosmotic swelling test and Eosin-Y) before separation and chromatin integrity (using acridine orange), concentration and motility before and after separation by migration sedimentation technique. All individuals had pregnant wives or had procreated a baby during the last year. RESULTS: The data of sperm membrane integrity by the eosin-Y and hypoosmotic swelling tests did not show significant statistical differences and the correlation between them was low. The percentage of motile sperm (grades a + b) increased from 57% to 87% (p < 0.001), the concentration decreased from 89 to 31 x 10(6) sperm/ mL (p < 0.001) and chromatin integrity increased significantly (p < 0.0001) after separation of semen. CONCLUSIONS: The great variation in the values obtained in the functional test in fertile males requires a re-evaluation of the use of these tests in clinical practice of infertility.

Evaluación funcional del esperma en varones fértiles columbianos / Functional evaluation of sperm in colombian fertile men

OBJETIVO: El fin del presente estudio fue evaluar en 111 eyaculados de individuos fértiles la integridad de la membrana de los espermatozoides antes de la selección, y la movilidad, la concentración, la integridad de la cromatina antes y después de la selección espermática. MÉTODOS: Evaluamos la integridad de la membrana (usando la prueba de hinchazón hipoosmotica y eosina Y) antes de la selección, y la integridad de la cromatina (usando naranja de acridina) concentración y movilidad antes y después de la separación mediante la técnica de migración sedimentación. RESULTADOS: Los datos de la integridad de la membrana espermática mediante la prueba de hinchazón hipoosmótica y eosina Y no mostraron diferencias estadísticamente significativas y la correlación entre estas fue baja. El porcentaje de espermatozoides móviles (grado a + b) se incrementó de 57% a 87% (p < 0.001), la concentración disminuyó de 89 a 31 x 106 espermatozoides/ mL (p < 0.001) y la integridad de la cromatina se incrementó significativamente (p < 0.0001) antes y después de la separación. CONLCUSIONES: la gran variación en los valores obtenidos en las pruebas funcionales en hombres fértiles requiere una re-evaluación del uso de estas pruebas en la práctica clínica de infertilidad

OBJECTIVE: The aim of the present study was to evaluate in 111 ejaculates from fertile men membrane integrity of spermatozoa before selection and sperm motility, and sperm concentration and chromatin integrity before and after selection of motile spermatozoa. METHODS: We evaluated the membrane integrity (using hypoosmotic swelling test and Eosin-Y) before separation and chromatin integrity (using acridine orange), concentration and motility before and after separation by migration sedimentation technique. All individuals had pregnant wives or had procreated a baby during the last year. RESULTS: The data of sperm membrane integrity by the eosin-Y and hypoosmotic swelling tests did not show significant statistical differences and the correlation between them was low. The percentage of motile sperm (grades a + b) increased from 57% to 87% (p < 0.001), the concentration decreased from 89 to 31 x 106 sperm/mL (p < 0.001) and chromatin integrity increased significantly (p < 0.0001) after separation of semen. CONCLUSIONS: The great variation in the values obtained in the functional test in fertile males requires a re-evaluation of the use of these tests in clinical practice of infertility