Issabella: You know, I have to say, based on the candy wrappers and the bags of junk food I see in this trash, I thought the person working here was ten years old.
Raj: Oh, please, show me a ten-year-old who knows to dip Tootsie Rolls in Nutella.

Sheldon: Oh, my goodness! I see quivering black lines. Those must be neurons. Oh, they're so thick and beautiful.
Amy: Those are your eyelashes. Move!

Amy: Well, Sheldon I see astrocytes. Our combined skin cells are now a primitive neural network.
Sheldon: I have such a profound sense of creation. I jus- It's like when I hatched Sea-Monkeys, except that this is from my DNA, so this is like Me-Monkeys.
Amy: These cells come from both of us.
Sheldon: Yeah, but Us-Monkeys doesn't pop. Oh, oh, oh, oh, wait! We-Monkeys. There you go.

Sheldon: Hey, when can we start running tests on it?
Amy: No reason we can't start right now.
Sheldon: What stimulus should we introduce it to first? Light, sound, temperature? Ooh! Ooh! Let's expose it to images of me and you and see who it likes better.

Amy: Sheldon, this is a rudimentary collection of neurons. I mean, it's remarkable, but it's still limited in what it can do.
Sheldon: I understand. (Talking to the petri dish of brain cells) She's the mean one, I'm the fun one.

Howard: Huh, they screwed up and gave us steamed broccoli.
Raj: Oh, no, that's mine.
Leonard: Really? The last green thing I saw you eat was a Skittle.

Howard: No, she's right. As long as I've known you, you've always been self-conscious about your cleavage.
Raj: It's because you keep trying to stick pencils in it.

Sheldon: Look, look here I am standing next to the incubator. Uh, here is a microscopic view of the cells.
Bernadette: Look at that. Put them in a tiny Flash T-shirt and it's you.

Sheldon: Yeah, this little guy can already recognize electronically transmitted images 20% faster than any other sample in Amy's lab.
Bernadette: I'm running out of ways to act excited.

Amy: So, enough about us, how are things going with you?
Bernadette: Great, the doctor said the baby's head is facing down now.
Amy: Good, you know, in case the exit isn't clearly marked.

Sheldon: Yeah, I have to say, it is nice to share this experience with someone who's on the same journey. Although right now ours is testing off the charts while yours is floating around in its own waste.
Bernadette: Are you actually comparing my human baby to your brain in a bowl?
Sheldon: Well, I didn't make you waddle up four flights of stairs for the heck of it.
Bernadette: You do realize my baby has functioning organs and can recognize voices.
Sheldon: Yeah, but ours can recognize a specific data stream among background noise.
Bernadette: Mine has a fully developed immune system.
Sheldon: Ours doesn't need an immune system because it lives in a state-of-the-art German incubator.

Amy: Sheldon, that's enough.
Sheldon: Oh, yeah, no, fine. Let's just agree that both creations are special in their own way and it is foolish to try and compare them. Although, we didn't need to have sex with Howard for ours, so we win.

Raj: This is fun. I have never cleaned a toilet before.
Issabella: You're kidding.
Raj: No, I grew up with a house full of servants and now I have a cleaning lady ... who is a lovely woman who I have great respect for.
Issabella: It's okay, you're allowed to have a cleaning lady.
Raj: Oh, good, because she also walks my dog, buys my groceries and cuts my hair.
Issabella: I think that's called a mommy.

Raj: So, forgive me forgive me for being nosy, but is there a wedding ring under those pretty rubber gloves?
Issabella: No, not for many years.
Raj: Oh, so, you are unencumbered?
Issabella: Just me and my son.
Raj: I love kids, how old is he?
Issabella: Nineteen.
Raj: That's a cute age. They can do so many things.

Issabella: Good night, Rajesh.
Raj: Okay, I'll leave. But just know, every time I come in here, I'll be thinking of you.