Endo Vit D Supp Pregnancy

---
name: endo-vit-d-supp-pregnancy
description: The guideline suggests empiric vitamin D supplementation during pregnancy to lower the risk of preeclampsia, intra-uterine mortality, preterm birth, small-for-gestational-age birth, and neonatal mortality. Consider this when a clinician inquires about vitamin D supplementation for pregnant patients to reduce pregnancy complications.
---

# Vitamin D supplementation during pregnancy

## STEP 1 — Gather Information
Confirm pregnancy and gestational age; assess current vitamin D intake from diet and prenatal vitamins; screen for conditions that increase risk of vitamin D toxicity (e.g., hypercalcemia, sarcoidosis, lymphoma). If pregnant and no contraindications, proceed.

## STEP 2 — Rule In / Rule Out
Is the patient pregnant? If yes, rule in and proceed to step 3; if no, rule out empiric vitamin D for pregnancy complications.

## STEP 3 — Classify or Stratify
Assess for contraindications to vitamin D supplementation (e.g., existing hypercalcemia, granulomatous diseases). If any contraindication is present, rule out high-dose vitamin D; otherwise, classify as suitable for empiric supplementation.

## STEP 4 — Decide
Prescribe empiric vitamin D supplementation (e.g., daily vitamin D 600–5000 IU, preferably lower daily doses) via fortified foods, prenatal vitamin formulations containing vitamin D, and/or a vitamin D supplement (pills or drops); do not rely on 25(OH)D testing.

## Clinical Guardrails / Mimics / Pitfalls
Avoid routine 25(OH)D testing; do not use high intermittent bolus dosing without monitoring; do not exceed the tolerable upper intake level without clinical supervision; do not initiate in patients with known hypercalcemia or granulomatous conditions; do not replace standard prenatal care or other indicated interventions.

## Concrete Clinical Example
A 28‑year‑old at 12 weeks gestation asks about vitamin D to lower preeclampsia risk; she takes a prenatal vitamin with 400 IU vitamin D daily and has no contraindications. Recommend continuing the prenatal vitamin and adding supplemental vitamin D3 to achieve a total daily intake of ~2000–2500 IU (e.g., add 1000–2000 IU vitamin D3 daily). No 25(OH)D testing is needed.

**Source:** Vitamin D for the Prevention of Disease: An Endocrine Society Clinical Practice Guideline, Endocrine Society, 2024, DOI:10.1210/clinem/dgae290