10 doctors weighed in:
What is the earliest week that I can have genetic testing for downs?
10 doctors weighed in

Dr. Ira Salafsky
Clinical Genetics
5 doctors agree
In brief: After 10 weeks
First trimester screening for down syndrome is done at 11 to 13 weeks.
Definitive diagnosis through cvs sampling and chromosomal analysis can be done after 10 weeks.

In brief: After 10 weeks
First trimester screening for down syndrome is done at 11 to 13 weeks.
Definitive diagnosis through cvs sampling and chromosomal analysis can be done after 10 weeks.
Dr. Ira Salafsky
Dr. Ira Salafsky
Thank
2 comments
Dr. Julia Pewitt Kinder
Please don't hesitate to ask if you have any other questions about what babies with Down syndrome are like (they are just like any other babies!).
Dr. Richard Roberts
That statement does not provide full disclosure with regard to The natural history of Down syndrome. Half of all babies are not born with a heart defect or will develop alzheimer's in their 50s. Babies with Down syndrome have just as much love to provide their families as any baby
Dr. Scott McLean
Clinical Genetics
1 doctor agrees
In brief: 10 weeks
Dr. S's answer is spot on.
One very new test can be done as early as 10 weeks using just a blood sample from the mother! some of the baby's dna can be found circulating in mom's bloodstream, and that dna can be tested to see if the fetus has trisomy 21. Trisomy 13 and 18 can also be detected this way. Here is a link for more information: http://www.Sequenomcmm.Com/home/patients/maternit21plus.

In brief: 10 weeks
Dr. S's answer is spot on.
One very new test can be done as early as 10 weeks using just a blood sample from the mother! some of the baby's dna can be found circulating in mom's bloodstream, and that dna can be tested to see if the fetus has trisomy 21. Trisomy 13 and 18 can also be detected this way. Here is a link for more information: http://www.Sequenomcmm.Com/home/patients/maternit21plus.
Dr. Scott McLean
Dr. Scott McLean
Thank
Dr. Richard Roberts
Clinical Genetics
In brief: 9 weeks 0 days
there has been a revolution in prenatal testing in the last year. 4 companies now offer testing for trisomies 21, 18, and 13 with 99.
99% accuracy with a maternal blood sample for free fetal DNA. One company offers it at 9 weeks 0 days and the other 3 offer it from 10 weeks 0 days; results take 7 to 10 days; confirmation of a trisomy with CVS or amnio is recommended.

In brief: 9 weeks 0 days
there has been a revolution in prenatal testing in the last year. 4 companies now offer testing for trisomies 21, 18, and 13 with 99.
99% accuracy with a maternal blood sample for free fetal DNA. One company offers it at 9 weeks 0 days and the other 3 offer it from 10 weeks 0 days; results take 7 to 10 days; confirmation of a trisomy with CVS or amnio is recommended.
Dr. Richard Roberts
Dr. Richard Roberts
Thank
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