Nineteen and a half weeks. No, she isn't actually sitting up on her own, but is propped up against the arm of the couch. She had her 4 month check-up on Friday, and is now 25 1/2 inches, and 12 lbs 2 oz. She got another round of shots, and then Saturday had a slight fever. Of course, it was also 96 degrees and humid, so she was really unhappy. She got two baths and two rides in the car to cool off. Sunday was much better, after the fever had gone away and some massive thunderstorms coold things off (we lost power for 5 hours on Saturday night, from 8:30 pm to 1:30 am).
We've also been working on getting her to nap, which is something of a challenge but we're making progress. We've seen some improvement already, with her able to get herself back to sleep at night on her own, which is a huge plus.