Sentence:  Bulls, rams and boars have the biggest testes among the larger domestic animals, so they would be expected to produce and <WSD>ejaculate</WSD> more sperms than others with smaller testes. 
Meaning of the word marked with <WSD> tags:  Of a human being or other mammal: to forcibly eject from the urethra in response to sexual stimulation, in a male, semen; and, in a female, vaginal fluid.