A numerical weight of 2
was assigned to creamy, 1 to milky and 0 to watery samples. The pH of
semen was recorded with a pH meter (Checker 1 of HANNA, with 0.01-
pH resolution and 0.2 accuracy). The mass activity of spermatozoa was
recorded immediately after semen collection by examining a drop of
semen on a warm slide at 100 × magnification under a microscope with
attached stage warmer (temperature set at 37 °C).