doi: 10.1186/s12884-022-05251-4. Affiliations Affiliations 1 The Reproductive Center, Chengdu Jinjiang Hospital for Women's and Children's Health, Sichuan, 610041, Chengdu, China. 2 Joint International Research Laboratory of Reproduction and Development of the Ministry of Education of China, School of Public Health, Chongqing Medical University, 400016, Chongqing, China. 3 Department of Epidemiology, School of Public Health, Chongqing Medical University, Chongqing, China.