The Cozzolino 2020 systematic review and meta-analysis in Fertility and Sterility found that women with sufficient vitamin D levels had higher clinical pregnancy rates than those who were deficient or insufficient, although this difference did not survive sensitivity analysis once one influential study was excluded, leaving the overall effect non-significant
Mateen S, Moin S, Zafar A, Khan AQ
[DOI] [PubMed] [Google Scholar] 15.Birkenfeld AL, Bergman M, Stefan N
Flammer AJ, Sudano I, Wolfrum M, Thomas R, Enseleit F, Priat D, Kaiser P, Hirt A, Hermann M, Serafini M, Lvques A, Lscher TF, Ruschitzka F, Noll G, Corti R
We sent them a cease and desist letter
Annals of the New York Academy of Sciences , 1194, 179-189