As per the values you have given , Bhcg MOM of .30 & , PAPP-A MOM of .76 are normal , the cut off for NB is also fine ..
But the interpretation of combined first trimester screening is done on the basis of risk ratio . All these values you have mentioned ( Maternal age , NT , BHCG & PAPP-A) are put in a software & the risk ratio is obtained.If the risk ratio is less than 1 in 250 , than it is considered screen positive & values more than 1:250 is considered screen negative
Answered2019-03-23 15:19:15
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