Please assess the completion status of the following clinical trial:

Trial Title: Evaluation of Vitamin D Requirements During Pregnancy

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: PREVENTION
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: PHASE3
- Number of Arms: 3.0

Eligibility Criteria:
Inclusion Criteria:~1. Women who are within the ages of 16-45 years~2. In good general health~3. Less than 12 weeks pregnant (based on last menstrual period)~Exclusion Criteria:~1. Mothers with preexisting type I or type II diabetes~2. Mothers with preexisting hypertension~3. Mothers with preexisting parathyroid disease or uncontrolled thyroid disease~4. Mothers with multiple fetuses (e.g., twins, triplets, etc.)

- Gender: FEMALE
- Minimum Age: 16 Years
- Maximum Age: 45 Years
- Healthy Volunteers: t

Study Arms:
- cholecalciferol-400 IU (Type: ACTIVE_COMPARATOR): Control group receiving 400 IU/day plus 0 IU vitamin D3 as placebo/day
- cholecalciferol 2000 IU (Type: EXPERIMENTAL): Experimental group receiving 2000 IU total vitamin D3/day.
- cholecalciferol 4000 IU (Type: EXPERIMENTAL): Experimental group receiving 4000 IU/day cholecalciferol

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