母乳喂养在中国比较普及，但有关哺乳与避孕相关关系的研究却很缺乏。因此有必要对采用不同哺乳形式的妇女使用避孕措施的相对概率进行比较。本研究主要描述产后一年妇女避孕措施的使用、哺乳及产后妊娠情况，目的是提高天津市产后妇女的计划生育水平。一、对象与方法：从天津 Breastfeeding is more common in China, but research on the relationship between breastfeeding and contraception is scarce. It is therefore necessary to compare the relative probability of contraceptive use among women using different forms of breastfeeding. This study describes the use of contraceptives, breastfeeding and postpartum pregnancies among women in the first year after delivery to improve the level of family planning in postpartum women in Tianjin. First, the object and method: from Tianjin