Research question What factors determine serum progesterone concentrations the day
before cryopreserved embryo transfer in artificially prepared cycles? Design Retrospective …

This study explores the relevance of mid-luteal serum hormonal concentrations in
cryopreserved embryo transfer cycles conducted under hormone replacement therapy …

STUDY QUESTION Does supplementation with vaginal tablets of progesterone after frozen-
thawed embryo transfer in natural cycles improve the live birth rate? SUMMARY ANSWER …

Different studies dealing with the start of progesterone supplementation in assisted
reproduction treatment cycles have shown that the problem apparently is the correct timing …

Objective To study the difference in live birth rate (LBR) between frozen-warmed blastocyst
transfer (FET) on the 6th or the 7th day of progesterone administration in artificially prepared …

Research question Do serum progesterone levels determine ongoing pregnancy rates
(OPR) in hormone replacement therapy frozen–thawed embryo transfer (HRT–FET) cycles …

Background Endometrial preparation with hormone replacement therapy (HRT) is the
preferred regimen for clinicians due to the opportunity to schedule the day of embryo transfer …

Objective To evaluate the effect of progesterone supplementation during the luteal phase on
pregnancy outcome in natural frozen-thawed embyo transfer (FTET) cycles. Methods In this …

Background There is a lack of consensus on the optimal dose and form of progesterone
supplementation during frozen‐thawed embryo transfer with hormone replacement therapy …

Purpose To investigate the impact of late follicular phase serum estradiol (E 2) levels on
implantation and pregnancy outcomes of cleavage stage cryopreserved/thawed embryos …