Why do winter born babies crawl earlier?

This was only a small study and really does not answer the question but does give you thoughts to ponder.

Why do you think winter babies crawl earlier?

http://www.thehealthsite.com/news/why-do-winter-b…

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8Theresa GouldChicago, Illinois
    09/16/14
    Melissa Middleton
    My son has not crawled yet and he is a winter baby.
    0
    About Theresa Gould
    Current: Chicago, Illinois
    Birth: August 10
    On Moms.com since: Aug 5, 2013
    ***Baby Team Leader Moms.com*** I have been married for over 20 years. My husband and I have eight children ages 18 down to 4 years old. We use to live in Chicago but now live in Canada. I own www.FaithandFamilyReviews.com.