birth defect的用法和樣例：
例句
用作名詞 (n.)
- Biliary atresia is a birth defect in which the bile ducts do not have normal openings, preventing bile from leaving the liver.
膽道閉鎖是一種不正常發育，使得膽管不能正常打開，導致膽汁不能離開肝臟產生作用。 - That is to say, before birth, certain hormones are deficient or their activity is impaired, and thus the typical development of the fetus toward maleness remains incomplete.
就是說，在個體出生之前，某種激素缺乏或激素活性降低，因此胎兒向男性方向正常發育未完成。
birth defect的相關資料：
近反義詞
【近義詞】
- congenital defect 先天性缺陷
- congenital abnormality 先天性異常
- congenital disorder 先天失常
- congenital anomaly 先天性異常
