Please assess the completion status of the following clinical trial:

Trial Title: Pethidine Analgesia on Labor Duration

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

Eligibility Criteria:
Inclusion Criteria:~* nullipar-multiparous patients;~* singleton pregnancies 37- 41 weeks (by the last menstrual period).~Exclusion Criteria:~* maternal respiratory rate \< 8 /min,~* maternal bradycardia (\<60 bpm),~* major fetal congenital anomalies,~* uterine scar presence from previous pregnancies,~* malpresentation,~* antepartum hemorrhage,~* multiple pregnancy,~* labor induction,~* chronic systemic disease,~* rupture fetal membranes,~* epidural analgesia.

- Gender: FEMALE
- Minimum Age: 18 Years
- Maximum Age: 40 Years
- Healthy Volunteers: f

Study Arms:
- Pethidine group / study group (Type: None): Study group; patients given pethidine; The partogram was recorded during delivery. Cervical examination was performed at 2 hour intervals. Recorded in the file. 4 cm and greater cervical dilatation; 50 mg intramuscular (IM) injection was given to pethidine. 200 Montevideo units uterine contractions were reached. Maternal vital signs, maternal complications and neonatal APGAR scores were recorded by the clinician 0-5-15-30-45-60 minutes after pethidine injection.
- control group (Type: None): The patients who received placebo injection were included in the control group. Saline was given in placebo.

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