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Paternal-age and birth-order effect on the human secondary sex ratio.
Because of conflicting results in previous analyses of possible maternal and paternal effects on the variation in sex ratio at birth, records of United States live births in 1975 were sorted by offspring sex, live birth order (based on maternal parity), parental races, and, unlike prior studies, ung...
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| Format: | Artigo |
| Sprache: | Inglês |
| Veröffentlicht: |
1985
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| Schlagworte: | |
| Online Zugang: | https://ncbi.nlm.nih.gov/pmc/articles/PMC1684568/ https://ncbi.nlm.nih.gov/pubmed/3985011 |
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