Since 1982, sex ratio at birth has been abnormal in China. In 2000, the sex ratio at birth in Hebei province lists number 13th in China, and the sex ratio at birth of Xingtai city is the 2nd in Hebei province. The abnormal sex ratio at birth has lots of i
杨慧,刘新华.治理出生性别比偏高问题的研究——以河北省邢台市计划生育工作为例[J].重庆工商大学学报(自然科学版),2007,(7): YANG Hui, LIU Xin-hua.[J]. Journal of Chongqing Technology and Business University(Natural Science Edition),2007,(7):