The objective of this study was to investigate whether pigs with different genetic merit for survival differed in birth weight, progress of farrowing, early postnatal behavior, or rectal temperature within 24 h after birth. On a nucleus farm in Rio Verde, Brazil, information was collected on 280 pigs, originating from 25 litters with known estimated breeding values for pig survival (EBVps). Lit...

Birth traits of 68 Angus and 49 Charolais x Angus calves sired by four Angus and seven Charolais bulls, respectively, were studied. Timed intervals during the calving process were compared between breed of sire groups. The Charolais sired calves required an average of 3.7 rain longer from the first appearance of the water bag until the feet were first visible; 8.1 rain longer (P<.01) from the t...

We look at whether women's status and autonomy affect birth-to-conception intervals using data from the Cebu Longitudinal Health and Nutrition Survey (CLHNS) in the Philippines. We followed 1123 married, fecund women, aged 25-49, for up to 5 years. In a 1994-1995 survey, women were asked about the timing of their last birth. In 1998-2000, women were asked about any pregnancies since the 1994-19...

BACKGROUND Short and very long interbirth intervals are associated with worse perinatal, infant and immediate maternal outcomes. Accumulated physiological, mental, social and economic stresses arising from raising children close in age may also mean that interbirth intervals have longer term implications for the health of mothers and fathers, but few previous studies have investigated this. M...

BACKGROUND Short and long birth intervals have previously been linked to adverse neonatal outcomes. However, much of the existing literature uses cross-sectional studies, from which deriving causal inference is complex. We examine the association between short/long birth intervals and adverse neonatal outcomes by calculating and meta-analyzing associations using original data from cohort studie...

the objective of this study was to investigate the effect of birth weight (bw) on future milk production and reproductive performance in iranian holstein cattle. records of holstein cows between 1967 and 2010 were obtained from the animal breeding center of iran. birth weights within each herd were grouped into five categories based on the standard normal distribution curves (z ≤-0.8416, -0.841...

The aim of this article is to determine whether the age of a woman at first birth is associated with treatment for high blood pressure (HBP) later in life.Baseline data for 62,914 women were sourced from the "45 and Up Study," an observational cohort study of healthy aging in Australia. These women had given first birth between the ages of 18 and 45 years. Odds ratios and 95% confidence interva...

Since determination of factors influencieng childbearing delay can provide convenient approaches to prevent fertility decline, nowadays studying this issue is an important issue for demographers and it is also emphasized by planners and politicians. The aim of this study is to evaluate factors influencing first birth interval among 458, young Iranian married women in Tehran province. In this cr...

Pairs of first and second births and pairs of second and third births to the same Norwegian mothers were studied to determine the association between interpregnancy interval and birth weight, stillbirth, and neonatal death. Use of the pair approach provides one birth which could possibly have been affected by the length of the interval and one birth which could not. The association of interval ...