Please assess the completion status of the following clinical trial:

Trial Title: Effect of Tramadol in Prevention of Postpartum Depression

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: PREVENTION
- Time Perspective: None
- Masking: TRIPLE
- Phase: PHASE4
- Number of Arms: 3.0

Eligibility Criteria:
Inclusion Criteria:~* 20 years old ≤ age ≤ 40 years old;~* ASA score I-Ⅱ;~* uncomplicated and singleton full-term pregnancy;~* voluntarily to receive cesarean section and postoperative controlled analgesia;~* consent to participate the study.~Exclusion Criteria:~* with history of mental disorders or psychotropic substances use;~* with history of neurological diseases such as epilepsy~* with history of previously known diagnosed depression;~* with suicidal ideation or history of suicide;~* with history of drug，alcohol or opioid abuse;~* with monoamine oxidase (MAO) inhibitor treatment at present or in the past 14 days;~* participating in other clinical studies~* with severe heart disease, brain disease, liver disease and kidney disease;~* be allergic to tramadol or opioids;~* with any contraindication for combined spinal epidural anesthesia;~* incapable of communication or cooperation.

- Gender: FEMALE
- Minimum Age: 20 Years
- Maximum Age: 40 Years
- Healthy Volunteers: f

Study Arms:
- Group T (Type: ACTIVE_COMPARATOR): All patients receive the patient-controlled intravenous analgesia with Tramadol.
- Group H (Type: PLACEBO_COMPARATOR): All patients receive the patient-controlled intravenous analgesia with Hydromorphone.
- Group E (Type: PLACEBO_COMPARATOR): All patients receive the patient-controlled epidural analgesia with Ropivacaine.

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