miscarriage
[ˈmɪsˌkærɪdʒ, mɪsˈkær-]
n.
流产，早产;
（信件等的）误投，误送;
失策，失败;
例句:
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If caught during pregnancy, it can cause miscarriage.
来自BBC
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I had another spontaneous miscarriage at around the 16th to 18th week.
我在大约第16至18孕周时又经历了一次自然流产。
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to have a miscarriage
流产
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Smoking during pregnancy increases the risk of miscarriage.
怀孕期吸烟会增加流产的危险.
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Miscarriage is almost always something that's outside your control.
来自BBC
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Occasionally, a 'missed' or 'delayed' miscarriage occurs.
来自BBC