Tadashi heads back to the lab ten minutes later, elusive tool in hand (I swear, I had it just a second ago…), a triumphant grin on his face, which slowly morphs into a frown when he sees Fred, Wasabi, Honey, GoGo and Hiro squeezed into the doorway.

"Guys? Why're y-"

He peers over Honey's shoulder and sees Elsa stood with her back against the work bench, Baymax stood about two feet in front of her, head covered in… is that coffee spray?

He pushes through the small mob at the door and walks over to his wife and lab partner. "Elsa..? Itoshii, what's going on?"

… she tries to respond. But she can't. Instead she just stands there with the rest of her coffee dripping from her mug onto her shoe and an incredulous look on her face, staring at the robot. Slowly, Tadashi turns. "Baymax?"

"I merely relayed the findings of my latest calibration test scan to Elsa."

A throat clears in the doorway and Fred leans forward slightly. Looking at the door, Tadashi can now clearly see the mixture of stupid grins and smug faces looking at the trio.

"What he actually said was," Fred pauses for a second, holding his finger up in the air and bouncing slightly on his toes. "'Low blood pressure, increased levels of progesterone, appetite and fatigue. Diagnosis: Pregnancy.'"

There's a small yelp as a coffee cup flies through the air and barely misses Fred's head, the last dregs deposited onto the lab floor.

"Mood swings are often indicati-"

That evening, it takes Hiro ten minutes to retrieve the tool from Baymax's arm.