How does the two-child policy affect the sex ratio at birth in China? A cross-sectional study

In China, the ratio of male to female babies during one child policy was as high as 1.4 to 1, but now that 2 babies is allowed, it's 1.11 to 1, closer to world average of 1.05 to 1. https://t.co/caaFBIspwS

In China, the ratio of male to female babies during one child policy was as high as 1.4 to 1, but now that 2 babies is allowed, it's 1.11 to 1, closer to world average of 1.05 to 1. https://t.co/caaFBIspwS

In China, the ratio of male to female babies during one child policy was as high as 1.4 to 1, but now that 2 babies is allowed, it's 1.11 to 1, closer to world average of 1.05 to 1. https://t.co/caaFBIagiK

In China, the ratio of male to female babies during one child policy was as high as 1.4 to 1, but now that 2 babies is allowed, it's 1.11 to 1, closer to world average of 1.05 to 1. https://t.co/caaFBIrRHk