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Secular trends in sex ratios at birth in North America and Europe over the second half of the 20th century
Context: A previous study showed that significantly more boys were born in southern latitudes in Europe than in northern latitudes and the converse pattern was observed in North America. Objective: This study analyses secular trends in gender ratios for live births over the second half of the 20th c...
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| Main Authors: | , , |
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| Format: | Artigo |
| Sprog: | Inglês |
| Udgivet: |
BMJ Group
2003
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| Fag: | |
| Online adgang: | https://ncbi.nlm.nih.gov/pmc/articles/PMC1732531/ https://ncbi.nlm.nih.gov/pubmed/12883068 https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1136/jech.57.8.612 |
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