Dinçgez, Burcu, Gülten Özgen, and Levent Özgen. “Can First Trimester Vitamin D Levels Predict Adverse Maternal Outcomes in Patients Who Do Not Take Vitamin D Supplements?”. The European Research Journal 10, no. 5 (September 3, 2024): 474–481. Accessed May 22, 2026. https://www.eurj.org.tr/article/view/944.