Artificial insemination of pigs-- examination of semen viscosity, density and sperm motility

The viscosity of normal semen is not big, with clear rice soup, if the viscosity is high, there must be a problem. Sperm density refers to the number of sperm in semen, which is related to the amount of ejaculation. the more semen, the lower the sperm density, and vice versa. The sperm density of normal semen is 10 to 3 billion per milliliter, which is usually examined under a microscope. If the gap between sperm is equal to 1 sperm, it is "dense", equivalent to 1 to 2 sperm, it is "medium", and 2 to 3 sperm is "sparse". Basically no sperm is "none" and must be abandoned. The criterion for determining sperm motility under a microscope is the proportion of sperm moving in a straight line in the field of vision. Sperm motility above 70% is normal and can be used for insemination. Sperm deformity rate means that the abnormal sperm under the microscope are mainly tail-breaking, decapitation, protoplast vesicles, big head, double head, double tail, folded tail, etc., generally not more than 20%, the less the better.