Please assess the completion status of the following clinical trial:

Trial Title: Magnesium Sulfate Versus Nifedipine for the Acute Tocolysis of Preterm Labor: A Prospective, Randomized Trial

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

Eligibility Criteria:
Inclusion Criteria::- Uterine contractions and cervical change or ruptured membranes in a preterm gestation Exclusion Criteria:- placental abruption, fetal distress, placenta previa, maternal medical contraindication to tocolysis

- Gender: FEMALE
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- Magnesium Sulfate (Type: ACTIVE_COMPARATOR): Preterm labor treatment with Magnesium Sulfate.
- Nifedipine (Type: ACTIVE_COMPARATOR): Preterm labor treatment with Nifedipine.

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