Correction to: BMC Pregnancy Childbirth 22, 19 (2022)

https://doi.org/10.1186/s12884-021-04368-2

Following publication of the original article [1], one of the authors was mistakenly deleted in the proof. The complete author names are listed below:

Chao-Fang Bai1,†, Guang-Hui Shen2,†, Ying Yang1,*, Ke Yang3, Melvin R. Hayden4, Yuan-Yuan Zhou1,5, and Xing-Qian Geng1

The original article has been corrected.