A physical or biochemical abnormality that is present at birth and that may be inherited or the result of environmental influence.
- Besides missing some birth defects, a routine ultrasound exam occasionally can suggest that a birth defect is present when none exists.
- A human body forms from the head down and from the center out, so the danger here then, when a toxic chemical enters our story, is physical malformation, or what we call a birth defect.
- I didn't know it was the number one birth defect too.
For editors and proofreaders
Syllabification: birth de·fect
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