5 doctors weighed in:
Whats the percentage that have birth defects?
5 doctors weighed in

Dr. Richard Roberts
Clinical Genetics
2 doctors agree
In brief: 3 to 4 %
The comprehensive NIH study of 50,000 pregnancies with infants followed up to the age of 7 years revealed approximately 3 to 4 % major birth defects in the neonatal period (not including genetic disorders like cystic fibrosis), defined as a condition requiring surgery, causing a significant cosmetic problem, or a significant functional problem. By age 7 years, the percentage of affected was 7%

In brief: 3 to 4 %
The comprehensive NIH study of 50,000 pregnancies with infants followed up to the age of 7 years revealed approximately 3 to 4 % major birth defects in the neonatal period (not including genetic disorders like cystic fibrosis), defined as a condition requiring surgery, causing a significant cosmetic problem, or a significant functional problem. By age 7 years, the percentage of affected was 7%
Dr. Richard Roberts
Dr. Richard Roberts
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1 comment
Dr. Richard Roberts
This figure does not include the 1% risk of the series genetic disorder that we all face.
Dr. James Ferguson
Pediatrics
1 doctor agrees
In brief: Depends on definitn
Most accept the definition of bds as anatomical abnormalities, large or small, obvious or not that are present at birth.
Some might include gene derived anomalies like extra fingers or metabolic issues like cystic fibrosis. Numbers for individual defects are easier to come by than inclusive numbers for this reason. (ie.Cleft lip, down syndrome) i've seen inclusive estimates from 3-6% for all bd's.

In brief: Depends on definitn
Most accept the definition of bds as anatomical abnormalities, large or small, obvious or not that are present at birth.
Some might include gene derived anomalies like extra fingers or metabolic issues like cystic fibrosis. Numbers for individual defects are easier to come by than inclusive numbers for this reason. (ie.Cleft lip, down syndrome) i've seen inclusive estimates from 3-6% for all bd's.
Dr. James Ferguson
Dr. James Ferguson
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