What is the feature ofuterine contractionsin threatened labor

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What is the feature ofuterine contractionsin threatened labor

A.The contraction usually lasts ≥ 30 seconds , with a break of 5-6 minutes

B.The contraction usually lasts ≥ 15 seconds , with a break of 3-5minutes

C.The contraction usually lasts ≥ 40 seconds , with a break of 3-4 minutes

D.The contraction usually lasts ≥ 15 seconds , with a break of 3-4 minutes

参考答案:

答案:The contraction usually lasts ≥ 30 seconds , with a break of 5-6 minutes