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- W2371330343 abstract "The natural sex ratio at birth is an important index that may be used to analyze and appreciate the deviation of sex ratio at birth.It lacks of research on the natural sex ratio at birth in Chinese population,scholars usually take the upper limit of the normal range of sex ratio at birth as criteria to judge the deviation of sex ratio at birth,but this method is questionable.This paper utilizes the twins data from the firth Census to study the features of China's sex ratio at birth of twins born in 1989.The results show that China's sex ratio of twins at birth in 1989 is 104.87,and remains relatively stable in most maternal bearing age groups.It suggests that China's sex ratio of twins at birth is near the natural sex ratio at birth.Compared with the sex ratio of twins at birth,the sex ratio at birth in Chinese population remained generally higher at almost maternal bearing ages,and showed different changing model with maternal bearing age." @default.
- W2371330343 created "2016-06-24" @default.
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- W2371330343 date "2012-01-01" @default.
- W2371330343 modified "2023-09-27" @default.
- W2371330343 title "Studies on Sex Ratio of Twins at Birth in Chinese Population" @default.
- W2371330343 hasPublicationYear "2012" @default.
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