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. 2021 May 12;23:140. doi: 10.1186/s13075-021-02522-x

Fig. 4.

Fig. 4

The relationship between the pre-pregnancy serum C3 level and the number of weeks of delivery in the cases of SLEDAI score ≤ 4. The preterm birth rate was significantly higher in the pre-pregnancy low C3 group (< 85 mg / dl) (42.1%) than that in the high C3 group (C3 ≥ 85 mg / dl) (14.7%) (P = 0.018). The number of weeks of delivery was 37 (35–38) in the low C3 group, which was significantly earlier than that in the high C3 group 38 (37–39) (P = 0.044)