system
Given the following post, respond as if you're commenting on Reddit:
human
[Pacific Rim] If kaiju are grown...

...how is one pregnant?
gpt
Delayed-action mechanism. It was designed to incubate a small "offspring" and release it during the attack, distracting the enemy or even being overlooked long enough to devastate much of the city.

In addition, as a last-ditch subterfuge that didn't really work out, if the fight had taken longer the infant might have been well-developed enough to quietly tunnel out of the corpse and sneak away.