Introduccion al estudio de la fecundidad

Incluye BibliografíaLos metodos se presentan de acuerdo a la fuente de obtencion de los datos, aquellos que provienen de estadisticas vitales y censos de poblacion y aquellos derivados exclusivamente de informacion censal. En cada caso, la presentacion analitica es ilustrada con ejemplos numericos de paises latinoamericanos. Entre los metodos, se dedican capitulos especiales al metodo de Mortara para obtener tasas de fecundidad por edad y a las tecnicas de Brass para estimar niveles recientes de fecundidad. Se agrega un apendice que muestra la evolucion de la fecundidad en los paises latinoamericanos, durante 1950-75

Efecto de la migracion en el crecimiento y la estructura de la poblacion de las ciudades de la America Latina

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Las estadísticas demográficas y la mortalidad en Guatemala hacia 1950 y 1964

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Republica Argentina: evaluacion y ajuste del censo de poblacion de 1960 por sexo y edad y tabla abreviada de mortalidad, 1959-1961

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Tabla abreviada de mortalidad. Republica Argentina 1946-1948

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La nupcialidad femenina en America Latina durante el periodo intercensal 1950-1960

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Costa Rica: comparación entre tres proyecciones de población 1950-1978

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Win-Win for Dairy Farms: Heifers Raised on Pasture Reduce Cost and Produce More Milk at First Lactation

Pastures under good management promote environmental, economic, and animal welfare advantages. However, comparisons of animal performance for pasture-raised dairy heifers versus confinement-raised dairy heifers are scarce. A study was conducted to evaluate the performance of dairy heifers raised on pasture or in confinement. Heifers raised on pasture had similar body weight and age at calving and greater dry matter intake in the end of 2nd grazing season. Cost of heifers raised on pasture was 26.7% less in the first grazing season and 58.4% less in the second grazing season compared to heifers raised in confinement. Heifers raised on pasture had greater dry matter intake and milk yield through first lactation. Physiological adaptation and nutritional benefits are involved in those benefits through lactation. Mammary gland development before breeding and increased feed intake before calving might be the main drivers for the advantages found for heifers raised on pasture compared to heifers raised in confinement. However, further studies are needed to evaluate nutritional and physiological differences of heifers raised on pasture compared to heifers raised in confinement

Non-classical forms of pemphigus: pemphigus herpetiformis, IgA pemphigus, paraneoplastic pemphigus and IgG/IgA pemphigus

The pemphigus group comprises the autoimmune intraepidermal blistering diseases classically divided into two major types: pemphigus vulgaris and pemphigus foliaceous. Pemphigus herpetiformis, IgA pemphigus, paraneoplastic pemphigus and IgG/IgA pemphigus are rarer forms that present some clinical, histological and immunopathological characteristics that are different from the classical types. These are reviewed in this article. Future research may help definitively to locate the position of these forms in the pemphigus group, especially with regard to pemphigus herpetiformis and the IgG/ IgA pemphigus.Universidade Federal de São Paulo (UNIFESP), Escola Paulista de Medicina (EPM) Dermatology DepartmentUniversidade Federal de São Paulo (UNIFESP), Escola Paulista de Medicina (EPM) Dermatology and Pathology DepartmentsUNIFESP, EPM, Dermatology DepartmentUNIFESP, EPM, Dermatology and Pathology DepartmentsSciEL