Drink several glasses of water about 1 hour before the test. Do not urinate until the test is finished. No changes necessary. Put on surgical gown. Examining rooms are frequently uncomfortably cool when you disrobe for the examination.
Discomfort disappears when the test is finished.
This test will not harm your fetus, if you are pregnant. Equipment used Mineral oil or water-soluble jelly. Ultrasound machine and transducer. Camera and film or videotape. Description of test Follow technician's instructions for positioning your body.