procreate
verb (used with object)
to beget or generate (offspring).
Used to express a completed action that took place before another specific past action occurred.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
As the worm had procreated during that day, it had forced computers all over the network to attack each other in ever greater numbers.
From Underground by Suelette Dreyfus