Amy: What is this?
Sheldon: A functional MRI of my brain. I did Sudoku before they took it so I'd be ripped.
Amy: I love it. Thank you.
Sheldon: And it's not just an MRI. The orbitofrontal cortex is lit up because I was thinking of you.

Raj: Don't come to the hospital. We're headed home.
Penny: Oh, that was fast. Did she sneeze the baby out?

Penny: Howard and Bernadette's kid might be born on your birthday. How cool is that?
Amy: Yeah, but I thought this baby was supposed to ruin their sex life, not mine.

Sheldon: Five minutes? We must be doing it wrong. It took us hours.

Sheldon: You know, I just learned Amy went to a theme park without me, but I'm not going to ruin her birthday. I'll wait, and ruin 24 individual hours sprinkled throughout the year.

Sheldon: This is for you. I was going to wrap it, but touching Scotch tape gives me the heebie-jeebies.
Amy: I'll put in on the list with peaches and felt.

Sheldon: We seem to be moving on to the annual coitus portion of your birthday festivities.
Amy: Is that okay?
Sheldon: I didn't put on my come-hither plaid PJs for nothing.

Amy: All right, you can open your eyes. I thought I'd let Harry Potter make things hotter.

Penny: She said not to come. It's gonna be a while.
Amy: (sighs) Well, first deliveries can be slow.
Sheldon: I am starting to rethink the Flash onesie I bought this kid.

Amy: I guess I guess we should stop.
Sheldon: Yeah, I'm afraid so. Childbirth, looming coitus? This is a banner night for female genitals.

Althea: Okay, Dad, how far apart are the contractions?
Howard: No idea. Ask him.
Raj: 12 minutes.
Althea: 12 minutes? Why are you here?
Stuart: Aren't we supposed to get here an hour and a half early?
Althea: This is a hospital, not the airport.

Howard: Stuart, stop driving like an old man. Speed it up a little.
Stuart: I'm not an old man! I just can't see at night.

Leonard: It's not just Howard and Bernadette. I mean, look how far we've all come.
Penny: Hmm.
Stuart: You two got married.
Amy: Sheldon and I are living together.
Sheldon: But if my mom asks, we have bunk beds.
Leonard: Penny was a struggling actress when we met, and now she's a successful pharmaceutical rep.
Penny: Okay, you don't have to say "struggling" every time. You can just say actress.
Stuart: Howard went to space.
Amy: Bernadette got her doctorate.
Leonard: Sheldon, Howard and I are working with the government on our quantum gyroscope.
Amy: We've all come a long way. There's a lot to be proud of.

Leonard: Sorry, Stuart.
Stuart: Hey, I'm in a hospital and I'm not the patient. I'm fine.

Penny: Does the baby have a name yet?
Howard: We have named her Halley.
Penny: Oh!
Leonard: Oh, like Halley's comet.
Howard: Exactly. Also like the comet, Bernadette said she's not gonna have sex with me for another 75 years.