I stumbled over article: Sex at birth is not always random — mum’s age and genetics can play a part.
Wow, that is really interesting.
...but actually the study doesn’t look at the influence of male partners.
Isn't that important??!
www.nature.com/articles/d41... (with ref to the full paper)
nature.com
Sex at birth is not always random — mum’s age and genetics can play a part
Families with three or more boys, for example, are more likely to have another boy than a girl as the next child.
