Sentence:  The spermatophores begin to <WSD>ejaculate</WSD> immediately after leaving the penis and the whole process is completed in a very few seconds. Pulling the filament attached to the ejaculatory end of a spermatophore is all that is needed to start its ejaculation. 
Meaning of the word marked with <WSD> tags:  To eject or suddenly throw fluid or some other substance from a duct or other body structure.