نتایج جستجو برای: birth rate
تعداد نتایج: 1061812 فیلتر نتایج به سال:
Diversification rates inferred from phylogenies are not identifiable if the allowed to vary freely over time. There infinitely many combinations of speciation and extinction rate functions that have exact same likelihood score for a given phylogeny, building congruence class. The specific shape characteristics such classes yet been studied. Whether within class share common features is also kno...
BACKGROUND Heart rate assessment immediately after birth in newborn infants is critical to the correct guidance of resuscitation efforts. There are disagreements as to the best method to measure heart rate. OBJECTIVE The aim of this study was to assess different methods of heart rate assessment in newborn infants at birth to determine the fastest and most accurate method. METHODS PubMed, EM...
Objective of the present study was to determine calving parameters in eighteen large dairy herds of Holstein Friesian in Tabriz. Data analysis showed that the mean gestations length were 276.69 ± 6.29, 279.54 ± 8.55 and 271.38 ± 7.34 days in multipara cows and twining pregnancy respectively. Percent of premature birth were 24.14% in twining (28 cases out of in 116 births), 9.61% in heife...
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