An ultrasound in pregnancy can be either done as a 'routine' anatomy ultrasound, usually between 18-20 weeks or it is done for specific reasons which usually depend on the time of pregnancy.
Unlike ultrasound imaging used to give parents a picture of baby in-utero, Doppler ultrasound is used to view blood flow in the fetus.
Ultrasound measurements of the fetus are important because measurements usually reflect the gestational age of the fetus, but if they fall outside the norm they can also indicate certain problems.
An ultrasound or sonogram during pregnancy is used to assess the development of the fetus and to look at other structures such as the uterus, ovaries, and cervix.
An ultrasound (or sonogram) examination in pregnancy is a medical procedure that uses high-frequency sound waves to scan a person creating pictures (sonograms) of the organs being examined.
Want to know the age-old question of "how many weeks pregnant am I?" Some simple rules of thumb can also be effectively used.
When can the fetal heart beat be seen first on ultrasound?
Fetal ultrasound measurements can show how the baby is growing and detect abnormalities. During pregnancy many different ultrasounds measurements can be done.
This chart outlines expected ultrasound measurements based on weeks of gestation.
You may have had a positive pregnancy test but when will you be able to have an ultrasound to confirm the pregnancy? And what will that early ultrasound show?
One of the most important reasons for prenatal visits and for doing an ultrasound examination is to estimate the fetal size of your baby.
The growth of the fetus (and the percentile of the ultrasound sonogram) during pregnancy is dependent on many factors. Check your baby's fetal growth with this handy chart.
During pregnancy many different ultrasounds measurements can be done. They can include the crown rump length (CRL), biparietal diameter (BPD), femur length (FL), head circumference
This estimated fetal weight calculator will calculate percentiles as well as the estimated fetal weights based ultrasound data and on many published formulas.
Ultrasound of the embryo and fetus before 14w0d of the pregnancy is the most accurate method to establish the pregnancy estimate due date (EDD). The crown-rump length (CRL) before 14w0d is accurate within 5-7 days of the actual due date. The earlier the CRL is done in pregnancy, the better the actual estimated due date can be calculated.
Gestational Sac (GS)
When the pregnancy hits the 20th week of gestation, an anatomy ultrasound is often ordered. This ultrasound is used to determine fetal anomalies, the baby's size and weight, and also to measure growth to ensure that the fetus is developing properly.
First trimester ultrasound scanning can diagnose many different issues in pregnancy.
Occasionally a so-called 'echogenci focus' or bright spot is seen in the heart of the fetus. Does this suggest an increased risk of Down syndrome in the baby?
The gestational sac is the structure surrounding the fetus early in pregnancy and its shape early in pregnancy (usually before 8-10 weeks) is important.
Q: I am 5 weeks and 4 days pregnant. I just had a sonogram done and the doctor told me she could not see the corpus luteum.I know the corpus luteum is necessary to produce enough of progesterone to support the pregnancy. Is it a problem? Is my pregnancy progressing well or in danger?
While ultrasound and Doppler fetal ultrasound heartbeat monitors are used by healthcare professionals throughout pregnancy, could the non-medical use of these devices be doing harm?
Some women are concerned when the fetus measures size-wize different on ultrasound when compared to their expected due date.
Ultrasound pictures are routinely done on most pregnant women. Below are two pictures. Try to identify what they show, then answer the quiz on the next pages.
Around 11-12 weeks many doctors perform a transvaginal sonogram to measure the fetal neck (nuchal translucency) to assess the risk of Down syndrome.
Choroid Plexus Cysts (CPC) are small fluid filled areas in the brain and they are a common ultrasound finding in the fetus during the 2nd trimester of pregnancy.
The placenta is the organ that supplies all the oxygen and nutrients the growing fetus needs.
A fetal echo or fetal echocardiography is an ultrasound test performed to evaluate the heart of the fetus during pregnancy and is often done as early as 20-24 weeks or later in pregnancy.
The amount of amniotic fluid is measured either by checking the largest pocket of fluid by ultrasound or by measuring the largest amniotic fluid pocket in each of four quadrants and then adding those up. This is called the AFI or Amniotic Fluid Index.
With vaginal bleeding the risk of miscarriage is high before you see the fetal heart beat and low without bleeding after you see the heart beat
A missed abortion or miscarriage can be diagnosed on ultrasound (sonogram) with several different signs.
Grading of the placenta can be done by ultrasound and by looking and how much calcifications there are in the placenta. A grade 3 placenta, for example, is normal at 40 weeks.
There are several ultrasound markers for Down syndrome which can be seen on sonogram during pregnancy and which can possibly indicate an increased risk for the fetus having Down syndrome.
The trusted transducer ultrasound is likely going to be a part of your prenatal check-up, but there may be a few additional ultrasounds in order that you will want to know about.