Source for Studies:

 Zanetti-Dallenbach R, Lapaire O, Maertens A, Frei R, Holzgreve W and Hosli I (2006a). ‘Water birth: is the water an additional reservoir for Group B Streptococcus?’ Arch Gynecol Obstet, 273 (4): 236-8, epub 6 October 2005.
 Zanetti-Dallenbach R, Tschudin S, Yan Zhong X, Holzgreve W and Hosli I (2006b). ‘Maternal and neonatal infections and obstetrical outcome in water birth’. Euro J Obster Gynecol Reprod Biol, Nov 6, epub.