Please assess the completion status of the following clinical trial:

Trial Title: Ultrasound Prediction of Prolonged Labour

Study Design Characteristics:
- Allocation: None
- Intervention Model: None
- Observational Model: CASE_ONLY
- Primary Purpose: None
- Time Perspective: PROSPECTIVE
- Masking: None
- Phase: None
- Number of Arms: None

Eligibility Criteria:
Inclusion Criteria:~* Primi gravidae~* \>37th week~* Cephalic presentation~* Prolonged first stage according to WHO definitions.~Exclusion Criteria:~* Multiple pregnancies~* Intrauterine fetal death

- Gender: FEMALE
- Minimum Age: None
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- Ultrasound examination (Type: None): Women with prolonged Labour; Primi gravidae, single pregnancy, \>37 weeks, fetus alive, cephalic presentation.

Based on this trial design, predict the completion outcome and termination type (if applicable).