Chorioamnionitis, also known as intra-amniotic infection (IAI), is an inflammation of the fetal membranes (amnion and chorion) most commonly due to a bacterial infection. Recently, experts have suggested using the term intrauterine inflammation or infection or both (Triple I) instead of the term chorioamnionitis, as a way to illustrate that chorioamnionitis can not be automatically confirmed if the mother simply only has a fever. [Source: Wikipedia 
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