HealthCareMagic is now Ask A Doctor - 24x7 | https://www.askadoctor24x7.com

Get your health question answered instantly from our pool of 18000+ doctors from over 80 specialties
159 Doctors Online

By proceeding, I accept the Terms and Conditions

Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

HCM Blog Instant Access to Doctors
HCM BlogQuestions Answered
HCM Blog Satisfaction

Is 17mm Of Femur Length Increase Risks Of Downs Syndrome?

Hi, today at my ultrasound they measured the femur length and it was 17 mm, which puts me in the 16 percentile, everything else was normal and my double screen was 1:2800 for downs syndrome and the NT at 12 weeks was 1.5 mm. I am now 15 weeks and 5 days and I was wondering if there is any increased risk of downs syndrome because of the femur length, thank you very much.
Tue, 5 Aug 2014
Report Abuse
OBGYN,  's  Response
Hi,
More than the femur length alone, it is the expected femur length which is calculated as follows:-9.645+0.9338*BPD. If the ratio is more than 0.84, Down's Syndrome is more likely. The nuchal translucency is within normal limits. Now-a-days, visualization of the fetal nasal bone is considered to be a very good sonographic feature to exclude Down's Syndrome. Please correlate the findings and ask your doctor to assess. I do not think there should be any risk. Hope you find this information useful. Wish you good health.
I find this answer helpful
Disclaimer: These answers are for your information only and not intended to replace your relationship with your treating physician.
This is a short, free answer. For a more detailed, immediate answer, try our premium service [Sample answer]
Share on
 

Recent questions on Femur


Loading Online Doctors....
Is 17mm Of Femur Length Increase Risks Of Downs Syndrome?

Hi, More than the femur length alone, it is the expected femur length which is calculated as follows:-9.645+0.9338*BPD. If the ratio is more than 0.84, Down s Syndrome is more likely. The nuchal translucency is within normal limits. Now-a-days, visualization of the fetal nasal bone is considered to be a very good sonographic feature to exclude Down s Syndrome. Please correlate the findings and ask your doctor to assess. I do not think there should be any risk. Hope you find this information useful. Wish you good health.