The prevalence of bacterial overgrowth syndrome varies depending on the population studied and the diagnostic methods used. In healthy people, BOS has been described in 0-12.5% by the glucose breath test, 20-22% by the lactulose breath test, and 0-35% when the 14 C D-xylose breath test is used.
The most common reason to have an amnio is to determine whether a baby has certain genetic disorders or a chromosomal abnormality, such as Down syndrome. Amniocentesis (or another procedure, called chorionic villus sampling (CVS)) can diagnose these problems in the womb.
Chorionic villus sampling (CVS) and amniocentesis are prenatal diagnostic procedures used to detect certain fetal genetic abnormalities. Both procedures increase the risk for miscarriage (1).