How vitamin D level influences in vitro fertilization outcomes: results of a systematic review and meta-analysis.

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ID: 127935
2020
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Abstract
To investigate the impact of serum vitamin D level on in vitro fertilization (IVF) outcomes.Systematic review and meta-analysis.Not applicable.Infertile women undergoing conventional IVF or intracytoplasmic sperm injection (ICSI).Systematic search of PubMed, MEDLINE, EMBASE, Global Health, The Cochrane Library, Health Technology Assessment Database, and Web of Science from inception until July 2019 with cross-checking of references from relevant articles in English. Vitamin D levels were categorized into three groups: deficient (<20 ng/mL), insufficient (20-30 ng/mL), and replete (>30 ng/mL). Before starting the data extraction, we registered the review protocol in PROSPERO (CRD42019134258).We consider clinical pregnancy rate (CPR), live birth rate (LBR), and/or ongoing pregnancy rate (OPR) as primary outcomes. Likewise, the miscarriage rate was considered as a secondary outcome.Primary analysis showed that women with a replete level of vitamin D had higher CPR and LBR/OPR compared to those with a deficient of insufficient level of vitamin D. However, sensitivity analysis led to non-significant differences between the comparators for CPR (odds ratio 0.71, 95% confidence interval 0.47-1.08, I2 = 61%) and OPR/LBR (odds ratio 0.78, 95% confidence interval 0.56-1.08], I2 = 61%). Also, for miscarriage a statistically different rate was not reached.Serum vitamin D levels do not influence IVF outcomes in terms of CPR, LBR/OPR, and miscarriage rate. Future large cohort studies are warranted to determine whether the threshold of vitamin D affects reproductive outcomes. Currently, there is a lack of consensus between the appropriate vitamin D threshold to predict reproductive outcomes compared to the one established for bone health.CRD42019134258.
Reference Key
cozzolino2020howfertility Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Cozzolino, Mauro;Busnelli, Andrea;Pellegrini, Livia;Riviello, Emma;Vitagliano, Amerigo;
Journal fertility and sterility
Year 2020
DOI
S0015-0282(20)30531-8
URL
Keywords
vitamin d in vitro fertilization live birth endometrial receptivity assisted reproductive treatments

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