【摘 要】 目的:了解深圳市布吉镇住院分娩婴儿出生性别比的水平和影响因素。方法：收集布吉镇主要的医院作为研究对象，收集自1985～2004年32706例住院分娩婴儿登记资料，计算婴儿性别比，并对可能影响出生性别比的因素进行统计学分析。结果：深圳市布吉镇1985年～2004年住院分娩婴儿的出生性别比偏高，达到118.13，并且性别比逐年上升；在分析的影响因素中，发现随着孕次数产次数的增大，性别比逐渐增大；孕产妇年龄越大，分娩婴儿出生性别比越高；在不同户籍的孕妇中，流动人口出生性别比高于暂住人口出生性别比，而常住人口出生性别比变化不明显，但都高于公认的正常高限。结论：深圳市布吉镇住院分娩婴儿出生性别比偏高，并且随着年份越靠后、孕产妇年龄的增长、孕产次数的增大出生性别比逐渐增大。性别鉴定而采取人工流产、弃婴溺婴可能是导致该结果的重要因素。

    【关键词】 性别比; 住院分娩

    【Abstract】 Objectives: To know the level of sex ratio at birth of hospitalized delivery infant and the influencing factors in Buji street of Shenzhen City. Methods: collected the main hospitals of Buji street as a study object, collected the registration data of 32,706 cases of hospitalized delivery infant from 1985 to 2004, counted the sex ratio of the infant, and gave a statistical analysis of the factors which may affect the sex ratio at birth. Results: from 1985 to 2004, Buji street of Shenzhen City had a high sex ratio at birth( to 118.13 )of hospitalized delivery infant, and the sex ratio increased year by year; Among the analysis of the impact factors, we found that the sex ratio was gradually increasing with the increasing number of pregnancy and birth; The older the pregnant and lying-in women got, the higher sex ratio of the infant at birth got; Among the pregnant women in different household registration, the sex ratio at birth of the floating population was higher than that of the temporary population, and the resident population did not change in evidence, but it was higher than the accepted normal limits. Conclusion: sex ratio at birth in Buji street of Shenzhen City was on a high side, and with more years on, the older the pregnant and lying-in women got, the increasing number of pregnancy and birth, sex ratio at birth increased. The important factors of gender identification and induced abortion may have contributed to the outcome. ......