If soy products reduce sperm numbers in men, why are there so many people in China?

Question

Where soy is a major protein source?

http://news.bbc.co.uk/2/hi/health/7519459.stm

Answer 1

There are many factors that reduce sperm numbers in men:

- smoking

- drinking too much alcohol

- even tight jeans have been blamed

This does not stop people breeding but generally makes it more difficult to conceive.  

Your question itself seems to disprove this Soy theory.  As you say Soy is a major part of the diet in China and they do not suffer high infertility as a result.

Answer 2

600,000 less fertile men are still going to produce more children than 150,000 'fully' fertile

Answer 3

persistence and a lack of good TV programming.

Answer 4

It seems fairly obvious that someone's wrong.