As an obstetrician, I've been watching the discussion about GBS and Candida with great interest. Frankly, I think the concern about Candida after only a few doses of antibiotic (GBS is treated only during labor, unless the mother becomes clinically ill; I'm limiting my comments to the prophylactic use of antibiotics as propounded by the CDC, ACOG, and AAP) is exager-rated, and have only rarely encountered clinical infections with Candida after such short-term use. But the use of hydrogen peroxide douches in pregnancy or intrapartum, or post-partum could be very dangerous, even fatal. Furthermore, it wouldn't work for very long, since the mother is colonized with GBS in her rectum and/or vagina, and the GBS always returns a few weeks after antibiotics, let alone local antiseptic therapy. There seems to be no increased proportion of moms with thrush, etc., in my patients who have GBS and get antibiotics. I hope someone else has some better data on this! Lisa Matthews, M.D., FACOG, Stamford, CT.