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concerned about the s/d ratio, or is this a normal value?

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Good morning,

I am currently 25 weeks pregnant and seeing a high-risk perinatologist because of a 20 week stillbirth (causes unknown) in December. I have been suffering a lot of anxiety during this pregnancy, and specifically asked for a doppler study to be done. The doctor measured my uterine artery flow--the s/d ratio was 4.6 at 24 weeks 6 days. She said that was normal, but later while reading some articles on the internet, it seems like a high value that is concerning to me. I do not have high blood pressure, nor do I have an IUGR baby (baby is measuring at 60th percentile). I had a subchorionic hematoma diagnosed at 8 weeks and bled and spotted from them until week 17 (have not bled or spotted for 8 weeks). I don't have any other risk factors except I am compound heterozygous MTHFR. I have a two-year-old daughter at home.

My question is: am I right to be concerned about the s/d ratio, or is that a normal value for 24/25 weeks and I am just being hypervigilant?


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replied October 29th, 2011
Second Trimester of Pregnancy Answer A28016
Hi,
Welcome to the ehealthforum and I am glad to help you out.

At 20 weeks gestation a few weeks after the normal S/D ratio range for umbilical artery is 3.84-5.6 and for uterine artery is range = 1.92-2.36. So if the S/D ratio is within these limits, it is within normal range. For exact confirmation, you may need a repeat color doppler at 28 weeks gestation.

It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care.


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