I had another doctor appointment this past Monday, and everything went great! The doctor wasn't planning on doing an ultrasound, but she had trouble finding the baby's heartbeat with just the doppler, so she ended up doing an ultrasound anyway. The heartbeat was much slower this time (145 down from 180), and she said everything looked perfect. I asked the doctor if there was any truth to links between the baby's heart rate and the sex and she said not really (but then she said she would bet our baby is a boy because it was difficult for her to locate a heartbeat at first!). I honestly have no idea what the sex is, so I guess we'll all just have to wait a few more weeks to find out for sure!