Yes,Jesse.   Let me simplify this for you.  Urine analysis did not determine the fluoride concentration in the water.  It determined the total fluoride intake from all sources.  The optimal level of fluoride, 0.7 mg/L,  is only that level of fluoride in fluoridated water, not from all sources .  You’re trying to compare total fluoride intake of pregnant women in Mexico, with the optimal level of  fluoride in fluoridated water.  Apples to oranges.  I’m not sure I can simplify this any further for you.
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You obviously don’t understand scientific study. That’s okay.  Most people don’t.  What isn’t okay is your misrepresenting a study by posting false information because you have not read the study and have no clue what it’s about.  Even more egregious is Kailin, an MD who should know better, misrepresenting the study by making false claims about it because she has not read it and has not one clue what it’s about, either.
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Such are antifluoridationists.
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Steven D. Slott, DDS