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IVF 50 percent more likely to result in pregnancy if high vitamin D – meta-analysis Nov 2017

Vitamin D and assisted reproductive treatment outcome: a systematic review and meta-analysis.

Hum Reprod. 2017 Nov 15:1-16. doi: 10.1093/humrep/dex326. [Epub ahead of print]
Chu J1,2, Gallos I1,2, Tobias A1,3, Tan B4,5, Eapen A1,2, Coomarasamy A1,2.


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More Live Births if > 30 ng of vitamin D

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More Pregnancies if > 30 ng of vitamin D

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STUDY QUESTION:Is serum vitamin D associated with live birth rates in women undergoing ART?

SUMMARY ANSWER: Women undergoing ART who are replete in vitamin D have a higher live birth rate than women who are vitamin D deficient or insufficient.

WHAT IS KNOWN ALREADY:
Vitamin D deficiency has been associated with an increased risk of abnormal pregnancy implantation as well as obstetric complications such as pre-eclampsia and fetal growth restriction. However, the effect of vitamin D on conception and early pregnancy outcomes in couples undergoing ART is poorly understood.

STUDY DESIGN, SIZE, DURATION:
A systematic review and meta-analysis of 11 published cohort studies (including 2700 women) investigating the association between vitamin D and ART outcomes.

PARTICIPANTS/MATERIALS, SETTINGS, METHODS:
Literature searches were conducted to retrieve studies which reported on the association between vitamin D and ART outcomes. Databases searched included MEDLINE, EMBASE, Cochrane Central Register of Controlled Trials and CINAHL. Eleven studies matched the inclusion criteria.

MAIN RESULTS AND THE ROLE OF CHANCE:
Live birth was reported in seven of the included studies (including 2026 patients). Live birth was found to be more likely in women replete in vitamin D when compared to women with deficient or insufficient vitamin D status (OR 1.33 [1.08-1.65]). Five studies (including 1700 patients) found that women replete in vitamin D were more likely to achieve a positive pregnancy test than women deficient or insufficient in vitamin D (OR 1.34 ([1.04-1.73]). All 11 of the included studies (including 2700 patients) reported clinical pregnancy as an outcome. Clinical pregnancy was found to be more likely in women replete in vitamin D (OR 1.46 [1.05-2.02]). Six studies (including 1635 patients) reported miscarriage by vitamin D concentrations. There was no association found between miscarriage and vitamin D concentrations (OR 1.12 [0.81-1.54]. The included studies scored well on the Newcastle-Ottawa quality assessment scale.

LIMITATIONS REASONS FOR CAUTION:
Although strict inclusion criteria were used in the conduct of the systematic review, the included studies are heterogeneous in population characteristics and fertility treatment protocols.

WIDER IMPLICATIONS OF THE FINDINGS:
The findings of this systematic review show that there is an association between vitamin D status and reproductive treatment outcomes achieved in women undergoing ART. Our results show that vitamin D deficiency and insufficiency could be important conditions to treat in women considering ARTs. A randomized controlled trial to investigate the benefits of vitamin D deficiency treatment should be considered to test this hypothesis.

PMID: 29149263 DOI: 10.1093/humrep/dex326

Created by admin. Last Modification: Wednesday November 22, 2017 02:51:56 UTC by admin. (Version 6)

Attached files

ID Name Comment Uploaded Size Downloads
8774 IVF Pregnancy.jpg admin 20 Nov, 2017 03:10 49.22 Kb 16
8773 Live birth.jpg admin 20 Nov, 2017 03:10 57.20 Kb 23
8772 IVF 2017.pdf admin 20 Nov, 2017 03:09 571.99 Kb 13
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