[Enchantress (OP)]

I just read the article, "Female hormones Feminishing Fish."  Some male species developed eggs because of the oestrogen in the water.  Coule this be a reason for the decline in human male testosterone?

[evan_au]

Yes, that is one of the theories.

But it doesn't have to be actual female hormones - there are other chemicals in the environment that have effects similar to hormones.

See: https://en.wikipedia.org/wiki/Male_infertility_crisis
https://en.wikipedia.org/wiki/Endocrine_disruptor

[chris]

This item from the Naked Scientists on oestrogen in water and how it affects animals is also informative

[syhprum]

Would not a decline in human fertility be a good thing ? many of the environmental problems are due to there being too many of us.

[set fair]

Oestrogen levels are so high in the waterways that some rivers have to stop and ask for directions to the sea.

[Bored chemist]

Oestrogen levels are so high in the waterways that some rivers have to stop and ask for directions to the sea.

Sorry, could you explain that please?

[Bill S]

Sorry, could you explain that please?

"You cannot be serious!"

I guess Set Fair is male.

[Bored chemist]

Sorry, could you explain that please?

"You cannot be serious!"

I'd seriously like to see an explanation.
Preferably one that's not crass.

[Bill S]

It would be interesting to see one that was not sexist.