Hi, I'm a little concerned about my baby's FL/AC and FL/BPD ratios. Both of them are a little low. FL/AC is 18%, FL/BPD is 59%. The other measurements are: BPD 49.5, AC 161.1, FL 29.3, HC 171.3, OFD 60.6, Cerebellum 21.8 I had my detailed scan at 19+6. Is there any sign of dwarfism or macrosomia? I am confused and worried.
Hello, this is Dr K.. Answers are not medical advice and do not constitute a doctor/patient relationship. I look forward to helping you today.
these are not low or abnormal at all
Less than 10% or over 90% may be cause for concern.
Concern regarding dwarfism is warranted if the femur length is less than 5%.
Macrosomia is a condition that occurs near term, not in the second trimester
I am concerned because of the ratios. I red on a website that a Decreased FL/BPD could indicate a skeletal dysplasia. That's because this ratio is a good indicator of fetal dwarfism as there is a very low chance that a normal fetus will have a value that falls outside ±4 SD. Mine is really low, more than SD. Why does it happen? Should I be concerned?
they indicate a Normal ratio FL/PD = 79 ± 8%
This ratio is not decreased.
My ratio is 59%. It seems low. Maybe I don't understand well how it works
Yes its low but I am sure its not more than 4 SD away from normal
What did your Dr say?
nothing at all. That's the reason I am worried.
Why would you be worried if your Dr said nothing? The results are normal :)
I don't understand why the single measurements are good but the ratio is low
The ratio is not low. Its just not as high as most
It is not abnormal
even if I found
on internet it should be higher
since I see a great difference between my ratio (59%) and the standard one
Yes I understand what you saw on the internet, but that doesnt mean a slightly lower or higher value is not normal
the standard one is 79 ± 8%
sorry if I insist but I am very concerned
Your values do not mean the baby has dwarfism. Thats exactly why your Dr did not mention it
So, the ratio has no importance at all?
No it does not have importance, its just that it must be considerably abnormal to be of significance In addition there is femur shortening
you mean, the value of my baby's femur is too short ?
No its not
It is only abnormal if there is femur shortening also
I really think you are fine