Funding
Reagents and equipment for the measurement of serum placental growth
factor were provided free of charge by ThermoFisher Scientific.
Keywords Trisomy 21, Down syndrome, PlGF, PAPP-A, combined test,
1st trimester, screening, detection rate, false
positive rate, screen positive rate
Tweetable Abstract: Adding PlGF does not increase combined
Trisomy 21 test detection rate