Glossary
3-D Ultrasound Evaluation
Technology that allows the baby's anatomy to be viewed in a three-dimensional perspective. It allows for quantitation of organ size and shape. It aids in determining fetal weight.
Amniocentesis
In amniocentesis, a thin needle is inserted through the mother's abdomen into the sac around the baby under sonographic guidance. A small amount of fluid is withdrawn and sent to a laboratory. Cells are cultured, and the baby's chromosome make-up is reported in approximately two weeks. In addition, the amount of a substance called AFP is determined, which gives information about some structural defects, such as spinabifida. The procedure is brief and causes minimal discomfort. It is a relatively safe procedure, with little risk to the pregnancy. Amniocentesis is recommended for women over the age of 35 or for women who have a family history of inherited disorders. It can be performed any time after 14 weeks of pregnancy , but it is generally recommended between 15 and 20 weeks.
Chorionic Villus Sampling (CVS)
CVS is an alternative to amniocentesis. The advantage is that it can be done earlier, between the 10th and 12th seeks of pregnancy. The results, which provide information about the baby's chromosomes, are usually available within seven days. In CVS, a small amount of tissue is withdrawn from the developing placenta with a thin catheter that is usually inserted through the cervix into the placenta under ultrasound guidance. It may also be performed transabdominally with a needle similar to the one used in an amniocentesis. The procedure is brief and causes minimal discomfort to the patient. The National Institute of Child Health and Human Development panel reviewed the safety of CVS and concluded that the evidence to date does not establish a cause-and-effect relationship between CVS and fetal abnormalities. The procedure is considered safe and poses minimal risk to the pregnancy.
Fetal Biophysical Profile (BPP)
The BPP is another detailed test of fetal well-being that is generally performed after 28 weeks. It is a sonographic assessment of your baby’s movement, tone, practice breathing and the amount of amniotic fluid present.
Fetal Doppler Velocimetry
Doppler technology allows us to assess the blood flow in the umbilical cord and even in fetal organs, including the brain, kidney and aorta. The information obtained is especially helpful in managing complicated twin pregnancies, growth-restricted fetuses and certain other high-risk pregnancies.
Fetal Echocardiography
Fetal echocardiography is a specialized ultrasound of your baby's heart. It detects most congenital heart defects. It is recommended if your baby is at a higher risk for a defect than the risk in the general population. For example, you may be at a higher risk if you have a family history of congenital heart disease, if you have diabetes or if you are on certain medications.
First Trimester Evaluation
The purpose of this ultrasound is to document the location of the gestational sac, note the fetal hear beat and number of fetuses seen. It is also important to evaluate the anatomy of the uterus.
Multifetal Pregnancy Reduction
Multifetal pregnancy reduction is a procedure done under special circumstances to reduce the number of fetuses in multiple gestation in order to improve outcomes for both mother and child/children.
Non-Stress Testing (NST)
An NST is a test of fetal well-being. An electronic fetal monitor is placed on the abdomen and a tracing of the fetal heart rate is generated. It is a painless, safe and non-invasive test that takes approximately 30 minutes. This test is repeated weekly, twice a week or even daily, depending on the risk factors. If the test is not entirely reassuring, additional tests may be recommended.
Percutaneous Umblical Blood Sampling (PUBS) or Cardocentesis
PUBS is a specialized test in which a sample of fetal blood is withdrawn from the umbilical cord under continuous sonographic guidance using a similar technique to an amniocentesis. Analysis of the blood can determine fetal chromosomal anomalies, some fetal infections and fetal anemia. Fetuses can be given blood or platelet transfusions through the cord as well.
Second and Third Trimester Anatomical Assessment
To evaluate the growth and development of the baby's organs, as well as to note the baby's position.
Ultrascreening/First Trimester Genetic Screening
This test is a screening test that assesses the risk of certain chromosomal abnormalities. It is a combination of an ultrasound examination and a blood test done between the 11th and 14th weeks of pregnancy. The ultrasound examination is a standard first trimester sonogram, but a specialized measurement called a nuchal translucency is obtained. The blood specimen is analyzed for two chemicals: free Beta-hCG (human chronic gonadoptropin) and PAPP-A (pregnancy-associated plasma protein-A), which are normally found in the blood of all pregnant women. The results of the nuchal translucency, the blood test and the mother's age give a specific estimated risk for Downs syndrome and Trisomy 18. If the test results show an increased risk, the patient has the option of having a CVS or amniocentesis.