Continuity mistake: The first time Juno is seen at school while visibly pregnant, she is talking to Bleeker who is holding a box of doughnuts. In shots from behind Bleeker the side of the box is see-through, while in shots from behind Juno the side is white, and it continues to change back and forth throughout the entire scene.
Trivia: The man who plays Juno's chemistry teacher is the DJ Lucas MacFadden, better known as Cut Chemist. His logo (a pair of scissors hanging over a beaker) can be seen in the form of prop scissors hanging over a beaker in the classroom.
Leah: Yo Yo Yiggady Yo.
Juno MacGuff: I'm pregnant.
Leah: What? Honest to blog? Are you sure it's not a food baby? Did you eat a big lunch?
Juno MacGuff: This is not a food baby all right? I've taken like three pregnancy tests, and I'm forshizz up the spout.
Leah: How did you even generate enough pee for three pregnancy tests?
Juno MacGuff: T don't know, I drank like, ten gallons of Sunny D... I'm telling you I'm pregnant and you're acting shockingly caviler.
Leah: Is this for real?
Juno MacGuff: Unfortunately, yes.
Leah: Oh my GOD. Shit! Phuket, Thailand!