Background: Many factors affect exclusive breastfeeding, include method of delivery, parity, maternal age and education, smoking, ethnicity, pregnancy complications, infant health, and environmental factors such as hospital practices, and social support. Recently, maternal obesity has been suggested as a risk factor for poor breast-feeding practices whose role has not...

abstract background: pregnancy with anxious or depressive symptoms might be associated with worse birth outcomes. the aim of this study was to determine the demographic predictors of anxiety and depression symptoms in pregnant women. materials and methods: we assessed pregnancy anxiety and depression levels among 142 women in three trimesters. all subjects completed two questionnaires: demograp...

the data set employed in this study was comprised of a number of 6,800 records of lamb’s longevity and their survival rate, collected from 1989 through 2009, from the lori-bakhtiari experimental flock at the shooli station in shahrekord, iran. the data were analyzed using linear models and proportional hazard models with weibull function. these models included fixed factors and direct additive ...

The aim of this study was to model the variances and covariances of body weight in Zandi sheep from 60 to 365 days of age using random regression models (RRM). Legendre polynomials of different orders were used to model the direct and maternal covariances. Mean trends were also modeled through a quadratic regression on orthogonal polynomials of age. Homogeneity and heterogeneity of the residual...