The criteria for the diagnosis of clinical chorioamnionitis include maternal pyrexia, tachycardia, leucocytosis,uterine tenderness,offensive vaginal discharge and fetal tachycardia.During observation,the woman should be regularly examined for such signs of intrauterine infection and an abnormal parameter or a combination of them may indicate intrauterine infection.The frequency of maternal temperature, pulse and fetal heart rate auscultation should be between every 4 and 8 hours.