Supplementation with vitamin D improves the embryo quality in in vitro fertilization (IVF) programs, independently of the patients' basal vitamin D status.

While no statistically significant differences were noted in implantation rates, there was an interesting trend suggesting a reduction in the abortion rate for the study group.

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Interestingly, we observed a slight improvement in the implantation rate after VD administration in those women with low baseline VD levels, although this increase did not reach statistical significance within the study group.

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