I read another article recently that said the rate of obesity is up in France as well (even though they are relatively thin still vs other countries). SO maybe there is a connection between the two.
Also in the last 16 years laptop use probably went up which can contribute as well. I am sure there are loads of other environmental factors as well.
I see that even with 1/3 less viable sperm they are still not having any trouble with having babies!
Want DP delivered to your inbox daily? Subscribe here: