ABSTRACT
Birth weight of a baby is the most important chance of its survivial, growth and development.With identifying and controlling risk factors which are mainly dependent on biological and social conditions,we can prevent birth of low weight babies. The main goal of this study was to examine the relationship between effective factors such as marital satisfaction, high blood pressure, age and occupation of mothers and baby's birth weight. In this study, among all the babies born in Yazd province hospitals in 1386 with parents residing in Yazd province, 941 babies were selected. Firstly, categorized sampling method [with respect to population ratio in each of the cities of Yazd province and season birth] was used. Secondly, cluster sampling method was used. A season day was selected randomly and all the data in that day and the rest of the days until reaching to a desired sample were recorded. The data were gathered by a researcher-designed questionaire and Enrich marital satisfaction scale. Data analysis was done by using "SPSS" software with logistic regression method. The results showed that pregnancy under the age of 19, extereme marital dissatisfaction, high blood pressure and being a working mother can meaningfully[p<0.05] increase the possibility of giving birth to a baby with low birth weight. Also it was cleared that baby's gender, season of birth, parents education, parents kinship before marriage have no meaningful effect on the possibility of baby's low birth weight. Regarding the negative effect of factors such as mother's blood pressure, extreme marital dissatisfaction like physical, emotional and sexual abuse, difficult job and job stress on birth weight, we suggest offering some training to couples at the time of marriage and pregnancy in order to prevent and avoid these factors