Update

Well, Riley had another doctor's appointment last week so I just thought I'd let everyone know how he's doing. He is about 27 inches tall and 17 lbs 11 oz. No more shots for about three months, Yipee!
Riley finally figured out how to roll onto his stomach from his back. That's good news because he could never learn crawl until he first learned how to get on his tummy. Unless he figured out how to do a crab walk or something like that. On the negative side though, when it's nap time I've been putting Riley in his crib awake to try to get him to learn to put himself to sleep. He doesn't like it at all, and usually rolls onto his belly to try to suck on the crib bumper pads. (I'm not exactly sure why that's comforting, but apparently it is. Maybe I should try it.) He usually cries and, now that he's laying on his belly, he gets snot and other gross things all over his sheets. I have to change them about three times every week. Just thought you all might like to know that!
He's also finally starting to master sitting up all by his baby self. You have to watch him though...he'll be sitting up just fine, and then two seconds later he'll keel over for no reason at all.