Sophia Alexandria Pierce was born at 2:27 pm EST today, weighing in at 6 lbs. 14 oz. Labor began at 11:30 pm last night, and we were at the hospital before 2am. I got very little sleep last night, of course, but I'm home now with the boys for the night.
Sam and Sophia are doing fine and will come home tomorrow. Ethan and Isaiah got to see her for a few minutes today and were thoroughly uninterested.
Update (1 pm Friday): She's got a pediatric heart murmur, which seems to have something to do with connecting the lungs and heart in utero, which usually disappears in the transition to the new environment but hasn't done so yet, so they're holding on to her for another day. I'll have to find out more about this, but my impression is that this happens all the time. My intitial search turned up a bunch of medical search engines that didn't say anything about what I was searching for, and I didn't have time before class today to do anything more.
Update 2: This seems to be what Sam was talking about. "It is estimated that at least 85 percent of babies will have a murmur during the first 24 hours after birth. This is caused by the normal closure of a blood vessel and usually goes away within 48 hours." This site calls it a "normal (innocent) heart murmur".
Update 3: I've got pictures up now.