Please assess the completion status of the following clinical trial:

Trial Title: Progesterone for Maintenance Tocolysis: A Randomized Placebo Controlled Trial

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: PHASE2/PHASE3
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:1. Pregnant women with arrested preterm labor between 24+0 to 33+6 weeks pregnant.~2. Intact membranes 3. Singleton pregnancy 4. Greater than or equal to 18 years of age 5. Cervical dilation less than or equal to 4cm Exclusion Criteria:1. Any contraindication to on-going pregnancy 2. Placental abruption 3. Placenta previa 4. Lethal fetal anomalies 5. Premature rupture of membranes 6. Multiple gestation 7. Less than 18 years old 8. Known allergy to any component of the study medication or placebo 9. Severe maternal medical illness

- Gender: FEMALE
- Minimum Age: 18 Years
- Maximum Age: 55 Years
- Healthy Volunteers: f

Study Arms:
- Progesterone (Type: ACTIVE_COMPARATOR): Progesterone 400mg per vagina qhs.
- Polyethylene glycol&hydrogenated vegetable oil (Type: PLACEBO_COMPARATOR): Polyethylene glycol\&hydrogenated vegetable oil per vagina

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