Jill-

According to what I have read there really isn’t anyside effects on the baby. You may not have read is article yet by Dr. Wilson. 

www.emedicine.com/PED/topic48.htm#section~follow-up

There is a section about prenatal interventions.  If you want to know more about dexamethasone, I have found a great web site on drugs.

www.nlm.nih.gov/medlineplus/druginfo/uspdi/202018.html

This web site is Medline Plus. For dexamethasone type in this Corticosteroids  Glucocorticoid Effects (Systemic) . This will give you all of the indication to use the drug, the contrainications, drug intractions, and side effect (common and when to be concerned).

I hope this will help you make an educated desicion. Robin