Zeina Alkhalaf — Endo Lab

rct 2026

Periconception Maternal-Serum Vitamin D, Vaginal Bleeding, and Subchorionic Hemorrhage in Early Pregnancy

Nutrients ·doi:10.3390/nu18142339

Background/Objectives: To examine relationships between maternal-serum 25(OH)D levels at preconception and 8 weeks' gestation and the risk of vaginal bleeding and subchorionic hemorrhage during pregnancy. Methods: A secondary analysis of th…

rct 2026

Preconception vitamin D status and subsequent risk of preeclampsia: A secondary cohort analysis from the EAGeR trial

Pregnancy hypertension ·doi:10.1016/j.preghy.2026.101417

OBJECTIVE: To evaluate associations between maternal serum 25-hyroxyvitamin D [25(OH)D] measured at both preconception and 8 weeks gestation and the risk of preeclampsia. STUDY DESIGN: A secondary analysis of the EAGeR Trial (2006-2012), w…

rct 2021

Markers of vitamin D metabolism and premenstrual symptoms in healthy women with regular cycles

Human reproduction (Oxford, England) ·doi:10.1093/humrep/deab089

STUDY QUESTION: Are insufficient 25-hydroxyvitamin D (25(OH)D) concentrations, and other markers of vitamin D metabolism, associated with premenstrual symptoms in healthy women with regular menstrual cycles? SUMMARY ANSWER: 25(OH)D insuffi…

observational 2018

Vitamin D is associated with bioavailability of androgens in eumenorrheic women with prior pregnancy loss

American journal of obstetrics and gynecology ·doi:10.1016/j.ajog.2018.03.012

BACKGROUND: Prior studies have reported mixed results regarding relationships between vitamin D, androgens, and sex hormone-binding globulin in patients with polycystic ovary syndrome. However, less is known regarding these associations in …