This was my response. But then, it was argued that the early menstration effect was only seen in the last 20-30 years. I unfortunately have no idea when the earlier menstration began.

It would also be interesting to see corelate this with the onset of heavy hormone usage in meat production.

Cheers!

JM

Paul Brandon wrote:

Only in a very indirect sense.
It's much more likely that the cause is generally improved nutrition, which has caused an increase in growth rate in general in the industrialized world.


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