Serum luteal phase progesterone in women undergoing frozen embryo transfer in assisted conception: a systematic review and meta-analysis

To investigate the association between luteal serum progesterone levels and frozen embryo transfer (FET) outcomes.Systematic review and meta-analysis.Not applicable.Women undergoing FET.We conducted electronic searches of MEDLINE, PubMed, CINAHL, EMBASE, the Cochrane Database of Systematic Reviews, Cochrane Central Register of Controlled Trials, Web of Science, ClinicalTrials.gov, and grey literature (not widely available) from inception to...