Objective to compare the urine protein-to-creatinine ratios (uPCRs) during labor at term between normal and women with pregnancy-induced hypertension (PIH), and to evaluate the patterns of change in uPCRs. Design observational study Setting Tertiary referral hospital in Taiwan Population normal pregnant or women only with PIH at term were enrolled Methods and Main outcome measures uPCRs in four phases (latent, active, recovery and early postpartum) and related clinical data at delivery were collected. Multivariate analysis with a linear regression model were performed to analyze continuous variables after adjusting for clinical data between two groups. Results 68 normal and 24 pregnant women with PIH were included. There were no differences in the uPCR or the proportion cases of uPCRs ≥ 300 mg/g between normal and PIH group in the latent, active, recovery or early postpartum phases. There was a statistically significant tendency for the proportion of uPCRs ≥ 300 mg/g to increase from the latent to the early postpartum phase in both groups. The proportion of uPCRs ≥ 300 mg/g significantly increased from the active to the recovery phase and then declined from the recovery to the early postpartum phase in normal pregnant women.Thus no differences in uPCRs cases change between any two phases in women with PIH, except the duration above stated. Conclusion. This is the first study to demonstrate that uPCRs data are not different between normal pregnant and PIH groups during the course of labor, but it did show different dynamic change patterns throughout the labor phases.