Lab Notes: Why some mums have all boys or all girls
- Author
- Australian Broadcasting Corporation
- Published
- Tue 22 Jul 2025
- Episode Link
- https://www.abc.net.au/listen/programs/lab-notes/lab-notes-all-girls-boys-siblings-genetics-age-biology/105558794
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.
