The probe rests against the back of your vagina while the images are captured. For this test, a small ultrasound probe is inserted into the vagina. This ultrasound is more likely to be used during the early stages of pregnancy, when capturing a clear image may be more difficult. These may give the doctor the information necessary to make a diagnosis if they detected problems during your traditional ultrasound.Ī transvaginal ultrasound may be done to produce a clearer image. More advanced ultrasound techniques may be used when a more detailed image is required. guide other tests, such as amniocentesis.diagnose problems with the ovaries or uterus, such as pregnancy tumors.determine if the fetus is getting enough oxygen.examine the fetus for structural abnormalities or blood flow problems.check for congenital abnormalities or birth defects.check for characteristics of Down syndrome (normally done between 13 and 14 weeks).look at the placenta to check for problems, such as placenta previa (when the placenta covers the cervix) and placental abruption (when the placenta separates from the uterus prior to delivery).monitor the fetus’ growth and position (breech, transverse, cephalic, or optimal).In the second trimester (12 to 24 weeks) and the third trimester (24 to 40 weeks or birth), an ultrasound may be done to: look for any abnormal growth in the fetusĭuring the second and third trimesters of pregnancy.diagnose an ectopic pregnancy (when the fetus does not attach to the uterus) or miscarriage.examine the placenta, uterus, ovaries, and cervix.determine the gestational age of the baby and estimate a due date. In the first trimester of pregnancy (weeks one to 12), ultrasounds may be done to: While ultrasound technology is safe for both mother and child, healthcare practitioners discourage the use of ultrasounds when there is no medical reason or benefit. Ultrasounds may also be done for nonmedical reasons, such as to produce images for the parents or to determine the sex of the baby. Your doctor may also order more ultrasounds if they detected a problem in a previous ultrasound or blood test. An ultrasound can be used for a variety of reasons during pregnancy.
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