Hi Larisa,

The work of Dr. Carol Wagner and her team addresses this.  600  
pregnant women participated in the study, of diverse ethnicities and  
skin tones.  The control group was given the American Academy of  
Pediatrics-recommended 400 IU per day; the second group received 2000  
IU; and the third, 4000 IU.  Discoveries included:
For the highest levels, premature births and premature labor were  
reduced by 50%.
Fewer babies were born smaller than expected.
Complications of pregnancy such as gestational diabetes, high blood  
pressure, and pre-eclampsia were reduced by 30%.
Babies born to mothers receiving the highest Vitamin D supplementation  
had fewer colds and skin problems such as eczema.
Dr. Hollis and Dr. Wagner are now conducting a study on the effects of  
Vitamin D supplementation on breastfed infants.  According to their  
pilot trials, in order for nursing newborns to continue getting the  
benefits of Vitamin D, the mothers must increase their supplementation  
to at least 6400 IUs.
Here is an online look at the study.
http://clinicaltrials.gov/ct2/show/NCT00292591


--Diana Cassar-Uhl LLLL, IBCLC in upstate NY

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