[Relationship between the frequency of cultured oocytes fertilization and morphology of human sperm]

The study has evaluated 304 cases under of vitro fertilization. Positive correlations were shown of semen parameters and fertilization rate. The individual spectrum of different sperm morphological types was shown to be constant. The discriminant analysis was used for comparison of two groups of patients--with low (less than 33%) and high (more than 67%) fertilization rates. The percentage of morphologically normal spermatozoa stronger correlated with fertilization rate. Although there was a fairly good correlation (in the order of their significance) with a progressive motility, grade of motility, percentage of slightly amorphous cells, sperm concentration, percentages of the neck and midpiece. The cut-off values of our discriminant test may conclusively predict the low (DF < 1.5) and the high (DF < 3.5) fertilization rates.