FREEBETA HCG
FreeBeta HCG is the only biochemical marker that can be used in both the first and second trimesters. In both trimesters, FreeBeta HCG is elevated in the blood of women carrying fetuses with Down syndrome (second trimester median MoM = 2.69) and reduced in the blood of women carrying fetuses with Trisomy 18/13 (second trimester median MoM = 0.20). in the second trimester, the comparable median MoMs for intact Hcg are 2.03 and 0.36, causing greater overlap between affected and unaffected fetuses.
