In this, the 200th episode, Stewie goes backwards in time and, unless he can stop it, he'll be back in Lois' womb and "unborn".

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!!Tropes:

* BackToFront: The majority of the episode's gags depending on seeing the result ''before'' the cause is shown.
* DumbassHasAPoint: At the end of the episode, Chris comments that he heard Stewie (who had just been re-born) was talking. [[CassandraTruth Lois writes it off as ridiculous]].
* NiceJobBreakingItHero: By messing around with Stewie's time machine, Brian ends up causing the flow of time to reverse, with him and Stewie being the only ones aware.
* OhNoNotAgain: Brain and Stewie's reaction to ending up back at the infamous ipecac incident from "8 Simple Rules For Buying My Teenage Daughter", only this time, it ends up going back ''into'' them.
* OhTheHumanity
* RewindGag: The entire point of this episode. "WE ATE SO MUCH VOMIT!!", sex in reverse, the chicken fight goes backwards, Stewie having his diaper ''un''changed...
-->'''Stewie''': Oh God, that all just went back into me!
* SoundEffectsBleep: Stewie gets one when he upchucks over eating vomit, only for reverse time to send right back in.
* StableTimeLoop: Stewie got his name because Brian went back in time.
* StaircaseTumble: Peter ends up going through one ''backwards''.
-->'''Peter''': Dammit, I hate these new stairs!
* VomitIndiscretionShot: {{Inverted}}, PlayedStraight, and then {{Inverted}} again. "[[RuleOfThree WE ATE SO MUCH VOMIT!!]]"
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