Karen,

This might be the article Janet was referring to.  You can see the abstract on Pubmed for free, but you’ll need to pay to see the full paper online (or access it at a medical library). 

Rivkees SA, Crawford JD.

Dexamethasone treatment of virilizing congenital adrenal hyperplasia: the ability to achieve normal growth.
Pediatrics. 2000 Oct;106(4):767-73.
PMID: 11015521 [PubMed - indexed for MEDLINE