Excessive twinning in a rural American genealogy: the demographic pedigree. Sheets, J., W. Acta Genet Med Gemellol (Roma), 36(3):349-53., 1987. abstract bibtex Excessive twinning in an extended family of rural Missouri concentrates in the isolated generations of 1874-1930s. Moderate inbreeding, larger sibships to older mothers, and access to local doctors may have combined to enhance this familial twinning. These biosocial factors are similar to an isolated case of excessive twinning in Scotland.
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title = {Excessive twinning in a rural American genealogy: the demographic pedigree},
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year = {1987},
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abstract = {Excessive twinning in an extended family of rural Missouri concentrates in the isolated generations of 1874-1930s. Moderate inbreeding, larger sibships to older mothers, and access to local doctors may have combined to enhance this familial twinning. These biosocial factors are similar to an isolated case of excessive twinning in Scotland.},
bibtype = {article},
author = {Sheets, J W},
journal = {Acta Genet Med Gemellol (Roma)},
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