As an OB sonographer, your job is to conduct ultrasound imaging procedures on obstetric patients. In this role, you may use various types of sonography equipment, help interpret results, and explain procedures to patients. OB sonographers focus exclusively on obstetric procedures and should not be confused with GYN sonographers, who focus more on women's health than on pregnancy. Some people perform both roles, and these jobs are usually advertised as OB/GYN roles rather than as one or the other. Most OB sonographers work regular hours, but employers may occasionally ask you to come in for emergency diagnostics at your regular clinic.