CRP and hydronephrosis: The parameters they compared were patient age, hospital stay, urine culture positivity, renal functions, pre and post-treatment pain score, degree of hydronephrosis, WCB and CRP level. They found that the significant parameters for the surgically treated group during their second trimester were CRP and WBC levels, preterm labour rate and pre-treatment pain, but the rate of fever was higher in the conservatively managed group.