1. Department of Maternal, Child & Adolescent Health, School of Public Health, Anhui Medical University , No 81 Meishan Road, Hefei 230032, Anhui , China
2. Key Laboratory of Population Health Across Life Cycle, Anhui Medical University, Ministry of Education of the People's Republic of China , No 81 Meishan Road, Hefei 230032, Anhui , China
3. NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract , No 81 Meishan Road, Hefei 230032, Anhui , China
4. Anhui Provincial Key Laboratory of Environment and Population Health Across the Life Courset , No 81 Meishan Road, Hefei 230032, Anhui , China
5. Ma'anshan Maternal and Child Health Center (MCHC) , No 24 Jiashan Road, Ma'anshan 243011, Anhui , China