What's been your experience with ultrasounds in the third trimester? It appears that a lot of you know how big your baby is currently, and the only time I ever had a measurement was at the very first ultrasound for dating, then at the 20 week anatomy scan. Are all of you having scans done at your regular OB's office to determine how big the baby is? I'm just curious on what to expect during the third trimester. When did your twice monthly visits start?