Members of the collaborative group

• International Steering Committee: Jom Olsen (Department of Clinical Epidemiology, University of Aarhus, Denmark); Brenda Eskenazi (Centre for Environmental Researchand Children's Health, School of  Public Health, University of Califomia,USA); Stephanie J. London (Epidemiology Branch, Division of Intramural Research, National Institute of Environmental Health Sciences, USA); Jun Zhang (Xin Hua HospitalAfiliated to Shanghai Jiao Tong University School of Medicine, China); Cuilin Zhang (Department of Obstetrics & Gynaecology, NUS Yong Loo Lin School of Medicine.National University of Singapore,Singapore).

• Study coordinating national study coordinating centre: State Key Laboratory of Reproductive Medicine and Offspring Health,Nanjing Medical University: HongbingShen, Zhibin Hu, Jiahao Sha, Jiayin Liu, Yankai Xia, Feng Chen, Guangfu Jin,HongxiaMa, Yuan Lin, Jiangbo Du, Feiyang Diao, Yang Zhao, Di Wu, Wei Wu, Chuncheng Lu,. Wei Wu, Di Wu, Minjian Chen,Xiumei Han, Bo Xu, Kun Zhou;

• Study regional coordinating centres: Obstetrics and Gynecology Hospital Affiliated to Nanjing Medical University: Rong Shen, Xuemei Jia, Zhengfeng Xu, Xiufeng Ling. Meiling Tong, Xia Chi, Ting Chen; Suzhou Hospital  Affiliated to Nanjing Medical University: Zhiliang Ding, Hong Li, Qingxia Meng. Kan Ye, Liping Zhu, Boxian Huang. Yanan Wang, Xiaoyan Wang,Changzhou Maternity and Child Health Hospital Affiliated to Nanjing Medical University: Zhonghua Shi, Bin Y, Li Chen.Lingmin Hu,Haiting Hu