Impact of Malnutrition on Reproductive Endocrinology

Brasel, Jo Anne

doi:10.1007/978-1-4684-0790-7_4

Cited by 6 publications

(5 citation statements)

References 90 publications

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“…Carael states that neither differences in method nor in duration of breast-feeding between the two populations could account for this 9 month difference and suspects that differences in protein intake may be a significant factor. Strong relationships also appear between nutrition, endocrinology and reproduction (Brasel 1978;Horrobin 1971). Deficiencies in specific nutrients are closely related to the function of the endocrine system and may have an overall effect on fertility.…”

Section: Nutrition and Reproductive Performancementioning

confidence: 94%

“…For example, a deficiency in vitamin B-12 may be associated with premenopausal infertility. This infertility may precede overt clinical evidence of pernicious anaemia (Brasel 1978). Dietary deficiencies in zinc may also affect fertility, resulting in impaired reproductive development and function, abnormal bone growth, a syndrome of dwarfism, sexual infantilism and iron deficiency anaemia (Lloyd, McDonald and Crampton 1978;Brasel 1978).…”

Section: Nutrition and Reproductive Performancementioning

confidence: 97%

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Diet, nutrition and population dynamics in the Basin of Mexico

Santley

Rose

1979

World Archaeology

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Section: Nutrition and Reproductive Performancementioning

confidence: 94%

Section: Nutrition and Reproductive Performancementioning

confidence: 97%

Diet, nutrition and population dynamics in the Basin of Mexico

Santley

Rose

1979

World Archaeology

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“…Although difficult to estimate, the percentage of male births at conception may be as high as 54.5 per cent (McMillen, 1979) which declines to 51.4 per cent at birth. Furthermore, malnutrition is a prenatal risk factor known to increase the likelihood of pregnancy complications, abortion, and stillbirth (Brasel, 1978;National Centre for Health Statistics, 1986;WorthingtonRoberts et al, 1985).…”

Section: Discussionmentioning

confidence: 99%

Human sex ratio as it relates to caloric availability

Williams

Gloster

1992

Biodemography and Social Biology

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ABSTRACT:The relationship between human sex ratios at birth and caloric availability per capita was examined across different countries. Significant positive correlations were obtained between the amount of food a country had available and the percentage of male births. Furthermore, increases or decreases in a country's caloric availability were related to corresponding changes in that country's sex ratio. These results provide evidence of adaptive sex ratio biasing in humans. The physiological mechanism by which this effect operates is probably higher mortality rates for male embryos and fetuses as a result of nutritional deficiencies and associated stressors.

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“…This syndrome, known as "maternal depletion," is cumulative with each reproductive cycle (Jelliffe 1973). Dietary deficiencies in iron and zinc may play a major role in impairing successful reproductive performance and enhancing rates of miscarriages, stillbirths, and infant mortality (Brasel 1978;Lloyd, McDonald, and Crampton 1978). Zinc also plays an important role in cell-mediated immunity, and both parasitic infection and malnutrition, common problems in the humid tropics, lead to increased zinc depletion, which affects the body's immunological response (Mata 1984;Solomons and Shripton 1984).…”

Section: Nutritional Problems Of This Sort Have Great Impact On the Smentioning

confidence: 99%

“…Thus, early weaning, while returning the mother to the reproductive pool, may also enhance rates of infant morbidity and mortality, since the weaning diet is often lacking in protein and a variety of essential vitamins and minerals. Diets lacking in meat, fish, fowl, and dairy products are also deficient in vitamin B12 which leads to pernicious anemia, neural disorders, psychotic behavior, and premenopausal infertility (Brasel 1978;Harris 1985;Horrobin 1971).…”

Section: Nutritional Problems Of This Sort Have Great Impact On the Smentioning

confidence: 99%

On the Maya Collapse

Santley¹,

Killion²,

Lycett³

1986

Journal of Anthropological Research

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The collapse of Late Classic Maya civilization involved more than the disintegration of political structure. It involved a total system failure in which both centers and dependent villages were abandoned by elites and commoners alike. The lowland rainforest habitat where Maya civilization developed was not significantly reoccupied until comparatively recent times. The collapse was differential, in that centers in coastal areas or drier regions such as northern Yucatan were not depopulated to the same degree. The collapse of many Maya centers in the forested interior is here attributed to three interacting sets of variables: (1) nutritional stress, disease, and demographic instability; (2) agricultural intensification, monocropping, and degradation of the agrarian landscape; and (3) the relative absence of macroregional resource extraction structures. These factors had little impact on Maya populations living near the coast or in lowland areas not originally covered by tropical rainforests. BETWEEN A.D. 300 AND 800 the ancient Maya developed a complex, hierarchically organized society in an environment we know today to be highly susceptible to environmental degradation and characterized by slow natural regeneration (R. E.W. Adams 1977; Culbert 1973; Gomez-Pompa and Vasquez-Yanez 1981; Rice and Rice 1984; Wilkerson 1985). In the Late Classic period (A. D. 600-800) substantial parts of the Maya Lowlands were densely occupied by populations of peasant farmers. Because most cultivable sections of the Peten and adjacent regions already had been brought under intensive cultivation, these farming populations made great demands on their tropical rainforest habitat. Classic populations combined dense settlement and intense agricultural production in physiographic regions as diverse as the Pasion and Usumacinta river drainages, the bajos and lakes of the central Peten, slopelands in the Rio Bec region, the river valleys and wetlands of Belize, and the drier regions in the northern section of the Yucatan Peninsula (Figure 1). It now seems likely that the very success of the Classic Maya at settling and developing the Lowland forest laid the foundation for the collapse of southern Lowland Maya civilization at the end of the Late Classic period. The growth and rapid decline of Maya civilization in the southern Lowlands provide a sharp contrast with other areas where ancient civilizations developed. In semiarid regions such as Central Mexico, the Andes, and greater Mesopotamia, periods of relatively sustained growth and development, separated by phases of political fragmentation, appear to be the norm throughout the prehistoric sequence. The sociopolitical systems of these areas all faced the problem of provisioning increasingly larger populations on circumscribed agricultural landscapes. The trajectory of cultural development in the Maya Lowlands, however, was different. The fluorescence of Classic period Maya civilization in the Peten and adjacent areas was followed not by periods of balkanization 123 124 JOURNAL OF ANTHROPOL...

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Impact of Malnutrition on Reproductive Endocrinology

Cited by 6 publications

References 90 publications

Diet, nutrition and population dynamics in the Basin of Mexico

Diet, nutrition and population dynamics in the Basin of Mexico

Human sex ratio as it relates to caloric availability

On the Maya Collapse

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