O41.1 - Infection of amniotic sac and membranes
O41.12 - Chorioamnionitis
O41.121 - Chorioamnionitis, first trimester
O41.122 - Chorioamnionitis, second trimester
O41.123 - Chorioamnionitis, third trimester
O41.129 - Chorioamnionitis, unspecified trimester