The triple test as a screening technique for Down syndrome: reliability and relevance

Area of Science:

• Prenatal screening
• Maternal serum screening
• Fetal aneuploidy detection

Background:

• The triple test, developed in 1988, screens for fetal aneuploidy in the second trimester.
• It has been largely replaced by earlier first-trimester combined tests and second-trimester quadruple tests.
• Newer tests offer improved detection rates and reduced false positives, minimizing invasive diagnostic risks.

Purpose of the Study:

• To review the role and continued relevance of the triple test in current antenatal care.
• To compare the triple test with newer screening methodologies.
• To assess the adoption of noninvasive alternatives.

Main Methods:

• Literature review of prenatal screening tests.
• Comparison of detection rates and screen-positive rates.
• Analysis of the adoption of noninvasive prenatal testing (NIPT) alternatives.

Main Results:

• The triple test identifies pregnant women for diagnostic testing for fetal aneuploidy.
• Combined and quadruple tests offer higher detection and lower screen-positive rates.
• Noninvasive alternatives have not been widely adopted despite development over 13 years.

Conclusions:

• The triple test, or its variations, is likely to persist in routine antenatal care.
• Despite advancements, the triple test remains a practical screening option.
• Further research or policy changes may be needed for widespread adoption of noninvasive methods.