# Vitamin D Deficiency of Couples and Infertility

> **NCT03305510** · — · COMPLETED · sponsor: **Tongji Hospital** · enrollment: 1500 (actual)

## Conditions studied

- Vitamin D Deficiency
- Infertility
- Couples
- In-vitro Fertilization

## Interventions

- **DIAGNOSTIC_TEST:** vitamin D is below 20ng/ml

## Key facts

- **NCT ID:** NCT03305510
- **Lead sponsor:** Tongji Hospital
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2016-03-01
- **Primary completion:** 2017-03-01
- **Final completion:** 2017-06-01
- **Target enrollment:** 1500 (ACTUAL)
- **Last updated:** 2017-10-10


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT03305510

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT03305510, "Vitamin D Deficiency of Couples and Infertility". Retrieved via AI Analytics 2026-05-24 from https://api.ai-analytics.org/clinical/NCT03305510. Licensed CC0.

---

*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*