Zhang's guideline to assess labour progression.

The article offers information on the study of evaluating the progress of labor. It mentions world health organization (WHO) developed a partograph to assess deviations from physiological labour progression; difference in use of intrapartum caesarean sections (ICSs) between obstetric units that used the WHO partograph and units that adhered to J. Zhang's guideline to assess labour progression; and WHO partograph show that physiological labour duration might be slower than Zhang research.