Doctor insights on:
Chances Of Having A Downs Syndrome Baby
I am at risk for a baby with downs syndrome but ultrasound at 20 weeks was normal with limb lengths. Does this mean chances are my baby is normal?
My sister has a two yrs old Down syndrome boy.What is the chance that a second baby is also affected?Is there chance to reduce the risk?
Depends: Traditional ds (>85%) have an extra 21 chromosome & recurrence risk runs 1% for young mothers but 1% + the age factor as a women ages. There are uncommon forms of ds due to transfer of pieces between chromosome where the mom or dad could be an asymptomatic carrier. The % of those varies with the defect & it would be best to consult a geneticist. If regular ds, the numbers above apply. ...Read moreSee 1 more doctor answer
Laws of genetics: When a woman with Down's Syndrome forms gametes (unfertilized eggs), all the chromosomes except #21 will split evenly. Since Down's Syndrome means three copies of chromosome 21 (by dehfinition), the chromosome cannot split "evenly" - half will have 1 copy (normal); the other half will have 2 copies (Down's syndrome carrier). These will pair with 1 copy (usually) of Chromosome 21 from the father. ...Read moreSee 2 more doctor answers
Downs : Is approx. 1 in every 30 pregnancies in moms 45 or over. So the odds are in your favor to have a non- Downs infant but the risk is many times greater than for women who are younger. ...Read more
No: This is listed is present in about 45% of infants with ds but may be seen at least on one side in 5-7% of normal infants. ...Read more
ACOG charts show the: risk of having a fetus with a Trisomy 21, Down Syndrome at prenatal diagnosis vs. the risk of having a live-born infant with DS because ~ 25% are lost. If there is no family history or prior infant with DS, at age 42 at delivery, the risk is 1/63; risk at 16 weeks' gestation is 1/50 - 1/55. Risk of any chromosomal disorder at term is 1/42. If 43 at term, DS risk is 1/49; of any trisomy, 1/33. ...Read more
Dr If FL is 1week2 days behind when comparing with BPD,AC,HC what are the chances of having down syndrome baby ?Im 25 years old.really tensed :(
Get the actual ans-: wer. With a blood draw, you will know if your fetus is affected with Down syndrome in 3 to 6 days by fetal DNA analysis; 99.9% accurate, with an amnio or CVS for confirmation of a positive to eliminate the approximate 1 in 1000 false positive. This test has made all of the ultrasound screening for Down syndrome obsolete. ...Read more
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