You may not eat or drink anything for 8 to 10 hours before the test. If you eat, the gallbladder and ducts will empty to help digest food and will not be easily seen during the test. If your test is scheduled in the morning, we suggest that you eat nothing after midnight the night before the test is scheduled.

Can you eat before a sonogram?

Empty your bladder 90 minutes before exam time, then consume one 8-ounce glasses of fluid (water, milk, coffee, etc.) about an hour before exam time. We recommend a two-piece outfit so we can access your abdomen without you removing your clothing. You may eat normally prior to having a fetal ultrasound.

What happens if you eat before ultrasound?

Your doctor will usually tell you to fast for 8 to 12 hours before your ultrasound. That's because undigested food in the stomach and urine in the bladder can block the sound waves, making it difficult for the technician to get a clear picture.