OBJECTIVE To determine the ideal luteal progesterone support regimen and serum
progesterone level on the day of embryo transfer to achieve a live birth in hormone …

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

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 …

Objective Low serum progesterone (P4) levels on the day of embryo transfer (ET) decrease
the ongoing pregnancy rates in artificial cycles for frozen embryo transfer (FRET). It is not …

Background: Progesterone (PG) is an essential hormone in the process of implantation and
pregnancy maintenance. Frozen-thawed embryo transfer (FET) is being performed …

Introduction Concerning contemporary in-vitro fertilisation (IVF) practice, the use of frozen
embryo transfer (FET) cycles has become more common than fresh transfers. Natural cycle …

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

Objective: In frozen-thawed embryo transfer (FET) cycles, preparing a synchronous
endometrium for the embryo is essential. Aim of this study is to provide individualized luteal …

Study question Are progesterone levels different in a NC versus a MNC? What is the
predictive value of progesterone for the level in a next cycle? Summary answer …

Objective The administration of progesterone before transfer in hormone replacement
treatment (HRT) is crucial for the clinical outcomes of frozen-thawed embryo transfer (FET) …