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妊娠 |
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孕婦：可能的症狀與妊娠綜合征：產前檢查
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羊水診斷
羊水診斷是產前檢查的專案之一，檢查中用一根細而長的針頭經孕婦腹腔刺入，提取羊水樣本。羊水乃胎兒漂浮的液體。為了探測胎兒嚴重的畸形，羊水診斷通常在妊娠第16-18周進行。
通常只有在樣本提取後的3-4周後才能夠獲得結論（胎兒的某些發育畸形結果可能較早獲得）。因為羊水診斷的副作用是有輕度的流產風險，孕婦和醫生在胎兒出身之前，必須對此項檢查的流產風險和獲取胎兒可能的遺傳性疾病資訊作出細緻的權衡，以確定是否有必要冒此風險。如果發現了胎兒有遺傳性疾病，則必須作出另外的抉擇：應該考慮做流產手術來終止此後的妊娠嗎？ |
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Pregnancy |
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The Woman During Pregnancy: Possible Problems and
Complications:
Prenatal Tests
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Amniocentesis
Amniocentesis is a procedure in which a long, thin needle is inserted through the woman’s abdomen to sample the amniotic fluid in which the fetus swims. It is usually performed 16 -18 weeks into the pregnancy in order to detect serious abnormalities in the fetus.
The results are usually available only after 3-4 weeks (for some problems earlier results are possible). Since there is a small risk of miscarriage as a result of the procedure, the woman and her doctor must weigh this risk against the benefits of learning about a genetic disorder in the fetus well before it is born. If such a disorder is found, another decision has to be made: Should an abortion be considered this late in the pregnancy? |
