Down’s Syndrome Screening Tests

Down’s syndrome (Mongolism) is an important chromosomal disorder which is encountered one 600-700 chance of conceiving a child in the society and can coexist with mental retardation and various anomalies. Therefore, all expectant mothers should be screened for Down’s syndrome. This screening is performed in two methods:

• Double test and nuchal translucency scan at 11 to 14 weeks of pregnancy
• Triple test at 16 to 18 weeks of pregnancy

Your physician who is in charge of your pregnancy care will inform you on the tests which are suitable for you. In the event that high risk is identified as a result of double test, performing chorionic villus sampling is recommended as an advanced test. As for triple test, amniocentesis is recommended as an advanced test in the event of high risk identification.

Considerations for double test and sonographic nuchal transculancy scan

Blood will be received and nuchal transculancy of the fetus will be measured with ultrasound within the dame day. You do not need to arrive with an empty stomach in order to give blood.

Considerations before triple test

Giving blood is sufficient for triple test. You do not need to come with an empty stomach. You should be sure of the date of your last menstruation, i.e. exact duration of your pregnancy, when you arrive for triple test. As ultrasound scan could be required as an addition if you are unsure, you should definitely inform your physician in such a case.