Why has the age of menarche decreased?

Subject: Why has the age of menarche decreased?

Date: Fri Nov 16 14:00:03 2001
Posted by Steven
Grade level: 10-12 School: No school entered.
City: No city entered. State/Province: PA Country: United States
Area of science: Development
ID: 1005937203.Dv

Message:


Why has the age of menarche decreased over the past 200 years? Are there 
environmental factors involved or biological ones? Could this be related to any 
diseases today and how does this affect our lives?

Re: Why has the age of menarche decreased?

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