Is there an adverse effect of sons on maternal longevity?
نویسندگان
چکیده
منابع مشابه
Is there an adverse effect of sons on maternal longevity?
Recent years have witnessed the emergence of a literature examining the effects of giving birth to sons on postmenopausal longevity in pre-industrial mothers. The original paper in this lineage used a sample (n=375) of Sami mothers from northern Finland and found that, relative to daughters, giving birth to sons substantially reduced maternal longevity. We examine this hypothesis using a simila...
متن کاملEffect of producing sons on maternal longevity in premodern populations.
Helle et al. (1) showed that producing and raising sons reduced the longevity of preindustrial Sami women, whereas daughters tended to have the opposite effect. They suggested that the life-shortening effect of sons could be attributed to higher endocrinological or physiological costs of producing sons compared with those of producing daughters, and that the life-elongating effect of raising da...
متن کاملSons reduced maternal longevity in preindustrial humans.
In humans, sons are physiologically more demanding to produce than daughters, as indicated by their faster intrauterine growth rate (1) and heavier birth weight (2) and the longer time it takes mothers producing sons to reproduce again (3). Large, and particularly strongly male-biased, family size is thus predicted to reduce maternal longevity (4 ). However, the long-term effects of genderbiase...
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the central purpose of this study was to conduct a case study about the role of self monitoring in teacher’s use of motivational strategies. furthermore it focused on how these strategies affected students’ motivational behavior. although many studies have been done to investigate teachers’ motivational strategies use (cheng & d?rnyei, 2007; d?rnyei & csizer, 1998; green, 2001, guilloteaux & d?...
Different effects of producing sons on maternal longevity in pre-modern populations
Selection criteria: We applied the same selection criteria as Helle et al., i.e. only women who lived to over 50 years of age were included. Furthermore, we included only women and men who were married just once in order to avoid confounding effects by children from several successive unions. Moreover, we excluded infertile couples. The women’s birth cohorts were limited to the time before 1800...
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ژورنال
عنوان ژورنال: Proceedings of the Royal Society B: Biological Sciences
سال: 2009
ISSN: 0962-8452,1471-2954
DOI: 10.1098/rspb.2009.0051