Fig. 10

Comparison of mean (+ /- SEM) user accuracy at classifying 100 ram sperm images/test each when using 8 morphological categories (Normal, ‘Proximal cytoplasmic droplets’, ‘Midpiece abnormalities’, ‘Loose/Multiple heads and abnormal tails’, ‘Knobbed acrosomes’, ‘Vacuoles and teratoids’ and ‘Swollen acrosomes’). Results are shown for the first test of each of the 5 testing days. The category ‘Pyriform heads’ was omitted from the data set due to insufficient occurrences in the population to allow for statistical analysis.