There are other ways of diagnosing Down syndrome and these include taking fetal tissues and testing the amniocentesis or chrionic villus sampling. These tests are usually ordered only if the doctor has a reason to believe that the baby may have Down syndrome.

The amniotic fluid is drawn from the mother’s belly by puncturing the uterus and then it is sent for further tests. The screening test for this condition only involves ultrasound which can reveal the preliminary causes of Down syndrome in babies. Through ultrasound if the abnormal growth pattern is found like the baby being small for age or has undeveloped body parts which is also accompanied with a low heart rate, then further tests are ordered to identify the possibility of Down Syndrome in the fetus.

A maternal serum screening test is a diagnostic test which later reveals and confirms the presence of Down syndrome in the fetus. The most important actor taken into consideration while screening the fetus is the age of the fetus. Only ultrasound can reveal the correct age of the fetus and that is why it has a lot of importance in the screening test for Down syndrome.

However, until the baby is born and grows up the confirmation of Down syndrome is still unclear. Also through research it is found that babies with Down syndrome have low levels of amniotic fluid and AFP, also known alfa feto protein. This can be found out through serum screening.

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