And approaches to minimize the abor - tion in practical production are also presented .
并提出了在生产实践中避免的方法措施。
This paper analysis the factors influencing birth level by marriage , contraception , induced abor - tion , breast feeding , education level .
本文分析了婚姻、避孕、人流、哺乳、文化程度等因素对生育水平的影响。