WHO Partogram Recommendations
The WHO Labor Care Guide (LCG), launched in 2020, should be universally adopted to monitor labor progress, replacing the traditional partograph, with active phase defined as beginning at 5 cm cervical dilation rather than the older 4 cm threshold. 1
Current WHO Position
The WHO has evolved its labor monitoring approach from the classic 1994 partograph to the 2020 Labor Care Guide. This shift reflects updated evidence from the 2018 WHO global recommendations on intrapartum care. The LCG comprises seven key sections:
- Information at admission
- Supportive care protocols
- Maternal monitoring parameters
- Fetal surveillance
- Labor progress tracking
- Medication documentation
- Shared decision-making framework
The critical change is defining active labor as starting at 5 cm cervical dilation, not 4 cm as in traditional models. 1
Evidence Base and Controversies
Original Partograph Benefits
The 1994 WHO partograph demonstrated significant improvements in a multicenter trial of 35,484 women:
- Reduced prolonged labor from 6.4% to 3.4%
- Decreased labor augmentation from 20.7% to 9.1%
- Lowered emergency cesarean sections from 9.9% to 8.3%
- Reduced intrapartum stillbirths from 0.5% to 0.3% 2
Modern Evidence Shows Mixed Results
Recent systematic reviews reveal the partograph's effectiveness varies by setting. In countries with already low cesarean rates, partograph use does not significantly reduce cesarean sections further. 3 However, the modified WHO partograph (eliminating the latent phase) shows advantages over the 1994 model with lower cesarean rates. 3
Critical Concerns with Current Guidelines
Expert opinion from 2023 raises substantial concerns about fixing active phase onset at 5-6 cm. This approach forces clinicians to ignore earlier active phase progression, potentially delaying diagnosis of abnormal labor patterns and subjecting mothers and fetuses to risk. 4 The traditional Friedman criteria documented that active phase can begin at various cervical dilations, and inflection points occur throughout the dilatation curve—not just at 5-6 cm. 4
Normal Labor Progress Parameters
When using any partograph system, recognize these thresholds for abnormal labor:
Normal active phase dilatation rates:
- Nulliparous women: ≥1.0-1.2 cm/hour
- Multiparous women: ≥1.5 cm/hour 4
Protracted active phase diagnosis:
- Cervical dilatation <0.6 cm/hour in active phase
- Associated with 25-30% rate of cephalopelvic disproportion 4
Implementation Challenges
A critical pitfall: Studies show that 50% of cesarean sections performed for "active-phase dystocia" actually had normal dilatation curves, suggesting either resistance to guidelines or poor understanding of dystocic labor. 4 This diagnostic error undermines the primary goal of reducing unnecessary cesarean deliveries.
The benefit of partograph use may stem more from increased attention to careful labor assessment than from the specific monitoring tool itself. 4
Practical Application
For settings with high cesarean rates (like Chile at 45%), implementing the WHO 2000 modified partograph could be beneficial, though local studies are needed. 3
In resource-limited settings, competent partograph use—especially with newer technologies—can save lives by identifying obstructed labor and other complications early. 5 However, implementation rates remain low despite decades of training, requiring health system support including ongoing staff education and addressing facility-specific barriers. 5, 6
Safety Considerations
Some studies report increased adverse maternal and fetal outcomes with newer guidelines, though results are inconsistent. 4 No long-term neurologic outcome studies have been conducted on children whose mothers' labors were managed using these protocols. 4
The Zhang guideline (similar to WHO LCG with 6 cm active phase threshold) independently increases postpartum hemorrhage risk (OR 2.101) and forceps delivery rates, despite reducing cesarean sections. 7 This trade-off between intervention types must be considered when choosing monitoring approaches.
Bottom Line for Clinical Practice
Use the WHO Labor Care Guide as your primary documentation tool, but remain vigilant for active phase changes occurring before 5 cm dilation—do not ignore earlier labor progression simply because it falls outside the guideline's defined parameters. Serial cervical examinations plotted graphically remain the most reliable method for identifying abnormal labor patterns. 4 When dilatation rate falls below 1.0 cm/hour (nulliparous) or 1.5 cm/hour (multiparous) after entering active phase, evaluate for cephalopelvic disproportion, malposition, and inadequate contractions before intervening. 4