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.
The sum of these measurements is the amniotic fluid index (AFI). An AFI of 25 centimeters or more indicates polyhydramnios. Your health care provider will also use a detailed ultrasound to diagnose or rule out birth defects and other complications. You may need additional tests as well, including: