Long, Qian, Zhang, Yaoguang, Zhang, Jing, Tang, Xiaojun and Kingdon, Carol ORCID: 0000-0002-5958-9257 (2022) Changes in caesarean section rates in China during the period of transition from the one-child to two-child policy era: cross-sectional National Household Health Services Surveys. BMJ Open, 12 (4). e059208.