"It was so good to see you again," the Doctor gave a sad smile, tearing up as he looked at Rose and his old self, standing in the doorway of the TARDIS. "Congratulations, by the way." Ignoring Rose and the Metacrisis' bewildered looks, he turned to Clara as the two left.
Rose and her Doctor made their way back to their own TARDIS.
"Y'know, we never did find out what he meant by 'congratulations,'" Rose noted as she climbed the stairs.
"Yeah. Oh well. Go on up, I just need to get her back into the Time Vortex," the Doctor smiled. Rose blew him a kiss and disappeared around a corner.
The half-Time Lord flipped a few switches and sent the baby TARDIS spinning through time. Glancing around the console to make sure Rose hadn't come back, he pressed a button or two and watched the computer monitor. Currently it was doing a full body-scan of one Mrs. Rose Tyler.
Snapping out his glasses, the Doctor peered closely at the results. He froze for a moment or two, taking it all in. "Rose!" he finally yelled. "Rose, you're not gonna believe this!" He bolted up the stairs, not sure whether he should laugh or cry.
The pregnancy check had registered as Positive.