Figure 3

Prevalence of histological Inflammation according to gestation and ethnicity. This graph demonstrates a bimodal relationship with gestation and placental inflammation. At the extremes of gestation, placental inflammation less than 28 weeks is over 60% and for women delivering at 40 weeks and beyond, the prevalence is approximately 40%. Between 37 and 39 completed weeks, the prevalence of histological chorioamnionitis reaches the minimal value of 24%. The fetal inflammatory response including funsitis is more pronounced at the extremes of gestation, and was absent in women delivering between 28 and 33 completed weeks.