OB/Fetal Ultrasound

Fetal Ultrasound is an exam using sound waves through a full bladder to obtain images that assess fetal age and well-being of your baby. Ultrasound can give your doctor additional information to give you the best possible prenatal care.


  • You will lie on an exam table with your pelvis exposed.
  • A non-greasy gel will be applied to your skin during the exam.
  • The sonographer will use a hand-held transducer (probe) against your pelvis to obtain images of your baby and pelvic organs.
  • The test may include a second part (transvaginal ultrasound). You can empty your bladder before this part of the test.
  • You will lie on your back with your knees raised (as you would for a pelvic exam).
  • A transvaginal probe covered with a sheath and a non-greasy gel is placed inside your vagina. You may be asked to insert the probe yourself as you would a tampon. The sonographer moves the probe to get the best images. The probe should not be painful. This gives a more detailed assessment of your uterus and baby.
  • The exam could take over one hour.


  • 32 ounces of water must be consumed one hour prior to exam time unless otherwise instructed.
  • Arrive 15 minutes prior to your scheduled appointment with a prescription if your doctor has given one to you.


  • Let the technologist know:
    • If you have difficulty holding your bladder.
    • If you have had pelvic surgery.
    • If you take any medications.
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