Obstetrical Ultrasound
Obstetrical Ultrasound
Biophysical Profile
High Risk Obstetrical Ultrasound
How to Prepare
Obstetrical Ultrasound
Also called: fetal ultrasound
Obstetrical (OB) ultrasound is most often used to determine the
date a baby is due and if it is growing as it should. OB ultrasound
may also be used to determine a baby's position or to determine
if multiple gestation is present. Depending on the baby's age, its heartbeat
and body
movements may be seen. If the baby happens to be in the right position,
its sex can be determined (but not always). Ultrasound can also
detect some birth defects. The baby's size and position may not
allow
certain abnormalities
to be detected.
Obstetrical ultrasound scanning requires the patient to lie on
her back on a scanning bed with her abdomen exposed. Using gel
and a transducer, the sonographer obtains images and measurements,
which are reviewed by a
radiologist.
Patients interested in a memento of their OB examination, may choose
between a still picture or video tape of their unborn child. Patient
must request taping prior to exam and provide a VHS tape.
Biophysical Profile
Biophysical profile is used to assess fetal well-being. This examination
includes evaluation of amniotic fluid volume, fetal respirations,
fetal body and extremity movement and tone. The examination is
usually performed in the third trimester of pregnancy.
High-Risk Obstetrical Ultrasound
High-risk obstetrical (OB) ultrasound is used to assess and monitor
complex pregnancy and atypical fetal characteristics.
How to prepare for all OB Ultrasound Exams
We appreciate your understanding the need to limit participation
at OB ultrasound appointments to the “mother-to-be” and one
supportive partner. OB ultrasound exams may take 30-60 minutes as the sonographer
gathers important information about you and your baby.
First Trimester Exam (the first 12 weeks)
A full bladder is essential for adequate visualization of the
uterus and fetus. Please finish drinking four eight-ounce glasses (32
ounces total) of water one hour prior to your appointment time.
Second and Third Trimester Exam (from 13 weeks to term)
No preparation is usually required. You may be asked to drink
some water for better visualization of your cervix and/or placenta.
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