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Will a child survive? Older siblings have a powerful influence

by Suzi Wilson | Sep 4, 2025 | Uncategorized | 0 comments

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Nature, Published online: 04 September 2025; doi:10.1038/d41586-025-02836-9

Swiss birth data from 1750 to 1870 reveal that girls who had lots of older brothers close to their own age were less likely to survive than were those who did not.

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