You may not receive
information about the test right away. Full results are usually available in 1
or 2 days.
- The fetus is the size expected for its
- The heart rate and breathing activity of the fetus is normal
for its age.
- If the test is done late in the pregnancy, the fetus
is in the head-down position.
- The placenta is the size expected for
the stage of the pregnancy and does not cover the cervix.
uterus contains an adequate amount of amniotic fluid.
- No birth
defects can be seen. (Many minor defects and some major defects are not easily
seen. Also, birth defects do not always show up early in pregnancy.)
- The fetus is growing more slowly than
normal, is small, or is underdeveloped for its age.
- The fetus is
abnormally large for its age.
- If this test is done late in the
pregnancy, the fetus is in the buttocks-down
(breech) position .
- Birth defects, such as absent kidneys or
anencephaly, are present.
- The placenta
covers the cervix (placenta previa ).
uterus contains too much or too little amniotic fluid.
- The fetus
is developing outside of the uterus (ectopic pregnancy ).
- The scan shows abnormal tissue instead of a
normal fetus (molar pregnancy).
- The fetal heartbeat is
not present. This can mean fetal death.
Many conditions can change fetal ultrasound results. Your
doctor will discuss any significant abnormal results with you in
relation to your past health.
What Affects the Test
Fetal ultrasound results may be
- Being very overweight or
- Stool (feces) or air in the
intestines or rectum.
- An abnormally low amount of amniotic
- Some fetal positions.
- Not being able to lie
still during the procedure.
- A very active fetus.
WebMD Medical Reference from Healthwise
June 18, 2012
This information is not intended to replace the advice of a doctor.
Healthwise disclaims any liability for the decisions you make based on this
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