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  1. Human facial expressions as adaptations: Evolutionary questions in facial expression research.K. L. Schmidt & J. F. Cohn - 2001 - American Journal of Physical Anthropology:3-24.
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  • Effects of infant feeding practices and birth spacing on infant and child survival: a reassessment from retrospective and prospective data.Barthelemy Kuate Defo - 1997 - Journal of Biosocial Science 29 (3):303-326.
    Retrospective and prospective data collected in Cameroon were used to reassess hypotheses about how infant and early childhood mortality is affected by birth spacing and breast-feeding. These data show that: (a) a short preceding birth interval is detrimental for child survival in the first 4 months of life; (b) full and partial breast-feeding have direct protective effects on child survival in the first 4-6 months of life, with the effects of the former stronger than those of the latter; (c) early (...)
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  • Women of lowland papua new guinea.Carol M. Worthman, Carol L. Jenkins, Joy F. Stallings & Daina Lai - 1993 - Journal of Biosocial Science 25 (4):425-443.
    SummaryIntense, sustained nursing lengthens inter-birth intervals and is causally linked with low natural fertility. However, in traditional settings, the effects of such nursing on fertility are difficult to disentangle from those of nutrition. Results from an prospective, direct observational study of reproductive function in well-nourished Amele women who nurse intensively and persistently but who also have high fertility are here presented. Endocrine measures show that ovarian activity resumes by median 11·0 months postpartum. Median duration of postpartum amenorrhoea is 11·3 months, (...)
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  • The ageing of Dutch fertility: socio-medical and policy implications.G. C. Beets, N. van Nimwegen, E. R. te Velde, C. M. Worthman, C. L. Jenkins, J. F. Stallings, D. Lai, E. Bonilla, A. Rodriguez & M. King - 1993 - Journal of Biosocial Science 25 (4):425-43.
    SummaryIntense, sustained nursing lengthens inter-birth intervals and is causally linked with low natural fertility. However, in traditional settings, the effects of such nursing on fertility are difficult to disentangle from those of nutrition. Results from an prospective, direct observational study of reproductive function in well-nourished Amele women who nurse intensively and persistently but who also have high fertility are here presented. Endocrine measures show that ovarian activity resumes by median 11·0 months postpartum. Median duration of postpartum amenorrhoea is 11·3 months, (...)
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