The doctor says

...that Ruby is the most amazing baby ever! Well, that's what I heard, at any rate. I guess her brain is growing great, her weight is up, she's taller and stronger than average, and it sounds like she's going to be able to turn herself over soon. Any day now, she's going to be singing Sweet Home Alabama and turning cartwheels too.

It's kind of crazy to think that all that growth is happening when the only thing going into her is this thin whitish liquid from my boobs.