Trisomy 18 Standard for counting based assays, 5% fetal fraction, 1ug in TE

A 1 µg cfDNA reference standard engineered to mimic a Trisomy 18-positive sample with a 5% fetal fraction. This material is a precise mixture of cfDNA from a Trisomy 18 cell line and a wild-type cfDNA background, provided in TE buffer for stability.

Serves as a critical positive control for validating and monitoring counting-based Non-Invasive Prenatal Testing (NIPT) assays. It allows laboratories to verify the detection of Trisomy 18 (Edwards syndrome) and assess the analytical sensitivity of their platform.

For optimal stability, store at -20°C or below. This standard is an essential tool for assay development, quality control, and ensuring the accuracy of aneuploidy screening results.