Does vitamin d boost IVF success? new study investigates

NCT ID NCT02361827

Completed Knowledge-focused Sponsor: The First Affiliated Hospital of Zhengzhou University Source: ClinicalTrials.gov ↗

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 2 times

Summary

This study looked at whether vitamin D levels in the blood affect the chance of a successful pregnancy after in vitro fertilization (IVF). Researchers followed 688 women aged 21-40 undergoing their first IVF cycle. The goal was to see if women with higher vitamin D levels had higher ongoing pregnancy rates at 12 weeks. The results could help clarify a controversial topic, but because this is an observational study, it cannot prove that vitamin D directly improves IVF outcomes.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

What this could lead to: If a clear link is found, it could help doctors advise women on vitamin D levels before IVF to possibly improve pregnancy chances.
What could go wrong: This is an observational study, so it cannot prove cause and effect. Previous studies have had conflicting results, and this one may not settle the debate.

This is an AI summary of the original study and may miss details. Read our disclaimer.

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Conditions

The condition(s) this trial relates to.

vitamin D deficiency

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

IN VITRO FERTILIZATION ONGOING PREGNANCY RATE VITAMIN D

Contacts and locations

Locations

Reproductive Medical Center, First Affiliated Hospital of Zhengzhou University

Zhengzhou, Henan, 450052, China

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