San Diego California's -A Baby Visit 3D 4D Ultrasound provides the highest quality elective 3d ultrasound, 4d ultrasound and early gender determination starting at only 13 weeks. A corporation of professional electrical engineers and certified sonographers. A Baby Visit provides the largest ultrasound theaters in The United States known for floor to ceiling viewing screens, top of the line safety standards and unbelievable 3d 4d ultrasound imaging.