We are a complete directory service of 3d 4d ultrasound centers in Sunnyvale for fetal imaging. So, if you are searching for 3d 4d ultrasound centers in Sunnyvale to get your baby sonograms than use our zip based search to find one. Sunnyvale is a city in Santa Clara County, California. According to the 2000 census, the city population was 131,760. It has a total area of 22.6 square miles. Sunnyvale weather remains moist in winters and comfortably warm in dry summers. Use our Find A Center form to find Sunnyvale ultrasound centers near to your home.