SPERM ANALYSIS

Semen collection and evaluation is the best way to determine a dog's fertility potential. The collection should precede breeding, allowing motility and morphology to be assessed. Standard semen evaluation is evaluation of sperm morphology, which can be done with eosin-nigrosin or Wright-Giemsa stains; eosin-nigrosin is preferred as it can also assess viability, with live sperm appearing white and dead sperm appearing pink under the microscope.