A2070.91±19.63*75.09±62.63*0.46±0.090.45±0.084.60±0.504.45±0.5141.25±3.9335.00±4.59

    B2065.75±43.41▲60.33±37.60▲0.54±0.150.56±0.174.50±0.514.55±0.6142.00±4.1037.75±3.43

    C20155.30±97.85#141.36±104.51#0.70±0.150.70±0.164.80±0.414.80±0.4136.50±5.8732.50±3.44

    F 7.9137.7853.3054.0540.7010.5871.3401.625

    P 0.0010.0010.0540.1020.5300.5510.2680.275

    注：II组与I组相同胎龄组相比*与A组相比，P<0.05；▲与B组比P<0.05；#与C组比P<0.05.

    3 讨论

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