Lab Notes: Why some mums have all boys or all girls
Update: 2025-07-22
Description
If you've given birth to three daughters, what are the odds that your next child will also be a girl?
One in two, right? Well … maybe not.
The odds of having a fourth girl could be a fair bit higher than 50 per cent, according to a new study into families with single-sex sets of siblings.
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