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To address claims of human exceptionalism, we determine where humans fit within the greater mammalian distribution of reproductive inequality. We show that humans exhibit lower reproductive skew (i.e., inequality in the number of surviving offspring) among males and smaller sex differences in reproductive skew than most other mammals, while nevertheless falling within the mammalian range. Additionally, female reproductive skew is higher in polygynous human populations than in polygynous nonhumans mammals on average. This patterning of skew can be attributed in part to the prevalence of monogamy in humans compared to the predominance of polygyny in nonhuman mammals, to the limited degree of polygyny in the human societies that practice it, and to the importance of unequally held rival resources to women's fitness. The muted reproductive inequality observed in humans appears to be linked to several unusual characteristics of our species-including high levels of cooperation among males, high dependence on unequally held rival resources, complementarities between maternal and paternal investment, as well as social and legal institutions that enforce monogamous norms.

Background: Women who experience unwanted pregnancy are at a greater risk of complicated pregnancy outcomes, and their children are more likely to experience physical or psychological problems in infancy, than those women with wanted pregnancies. The objective of this research was to explain the impact of a partner on women's decisions to want or not want their pregnancies., Methods: A primary study subsample of 349 clinical interviews of pregnant women comprised the quantitative portion of the analysis, with a secondary study subsample of 20 in-depth qualitative interviews of pregnant women complementing the statistical findings. Both samples included adult women (at least age 20 yr) of different ethnic groups who received Medicaid for their pregnancies and were in their first or early second trimester of pregnancy. Chi-square, t tests, and logistic regression were used for statistical analyses., Results: A partner's stability, status, feelings toward pregnancy, and level of dependability and support all had a significant influence on women's experiences of unwanted pregnancy. Variables including use of contraception (OR = 3.3), women's ethnicity (OR = 1.9), partner's feelings about pregnancy (OR = 2.0), amount of social support (OR = 1.2), and mother's instrumental support (OR = 0.85) all affected women's perceptions of wanting the pregnancy. These results were used to create a model of unwanted pregnancy, beginning before conception and ending with either termination of pregnancy or initiation of prenatal care., Conclusions: The support and concern of a partner during pregnancy can have positive consequences for a mother's desire to carry out the pregnancy. To increase their commitment to the pregnancy and childbirth, partners should be included more in the prenatal care process.

Research on health status in the Andes highlands is synthesized to demonstrate that intracultural diversity in the region is greater than often appreciated. Understanding the range of diversity in health status requires a biocultural model of sickness processes. Ecological, sociocultural, political-economic and historical factors, such as altitude, mode of production, labor relations and land reform, are shown to combine to produce varying levels of health as measured at the community level. The model is illustrated both by comparing communities and by the in-depth examination of a single community in the northern Peruvian highlands. A rapid assessment checklist is provided to aid health agents in better assessing the relative health of communities in a potential intervention area.

This study of a chiropractor and his patients represents the first interaction analysis of an alternative practitioner. Relationships between the types and quantities of communications in clinical exchanges and patient satisfaction with treatment are examined using both quantitative and qualitative analysis of verbal dialogue and clinical observations. Findings suggest that patient satisfaction is enhanced by a practitioner-patient relationship characterized by initial transmission of large amounts of comprehensible information successively supplanted by personal affective dialogue. New patients are usually unfamiliar with the chiropractic belief system and may have special communication needs due to the psychoemotional component to their, often chronic, problems. The chiropractor provides the patient with a structured, supportive environment and theoretical explanations designed to take the mystery out of process and problems. In essence, the chiropractor first manipulates a patient's belief structure before manipulating his or her physical structure, providing an analogous structural realignment in both the mind and body. Contrasts between biomedical and chiropractic clinical encounters are noted.