A primigravida presents with irregular painful contractions. On examination, the cervix is 2 cm dilated and 50% effaced. After 12 hours of observation, there is no cervical change. Which of the following best defines this labor abnormality?
- A Active phase arrest
- B Protracted active phase
- C Prolonged latent phase ✓
- D Secondary arrest
Correct answer: C. Prolonged latent phase
Explanation
C prolonged latent phase is defined as a latent phase lasting more than 20 hours in a nullipara or more than 14 hours in a multipara. Active phase arrest requires 6 cm dilation with no change for 4 hours with adequate contractions. Protracted active phase refers to a slow rate of dilation. Secondary arrest occurs after 6 cm dilation.
Reference: Williams Obstetrics, 26th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.