A new study published in the journal AIDS [1] shows that transmission rates have been reduced through appropriate interventions in the UK and Ireland.
Townsend at al. AIDS. 22(8):973-981, May 11, 2008. Low rates of mother-to-child transmission of HIV following effective pregnancy interventions in the United Kingdom and Ireland, 2000-2006 [2].
A good report on the study at aidsmap [3].
Links:
[1] http://journals.lww.com/aidsonline/pages/default.aspx
[2] http://journals.lww.com/aidsonline/pages/articleviewer.aspx?year=2008&issue=05110&article=00008&type=abstract
[3] http://www.aidsmap.com/en/news/A9C420C3-CA61-42D6-870B-E25C67339E28.asp