Introduction Low serum progesterone concentration on frozen embryo transfer (FET) day in
hormone replacement therapy (HRT) cycles results in lower reproductive outcomes. Recent …

Objective To evaluate whether patients with high-serum progesterone levels before frozen
embryo transfer (FET) under hormonal replacement therapy present with worse reproductive …

STUDY QUESTION Does oestrogen dose tapering during the luteal phase affect the clinical
outcome after hormone replacement treatment–frozen-thawed embryo transfer (HRT-FET) …

Background Progesterone administration before transfer in hormone replacement treatment
(HRT) is crucial to pregnancy outcomes in frozen-thawed blastocyst transfer (FET), but the …

We read with interest the recent publication “Do serum progesterone levels on day of
embryo transfer influence pregnancy outcome in artificial frozen-thaw cycles?” by Volovsky …

STUDY QUESTION Does an individualised luteal phase support (iLPS), according to serum
progesterone (P4) level the day prior to euploid frozen embryo transfer (FET), improve …

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 …

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

Sir, We would like to thank Xie and Li for their interest in our study (Alvarez et al., 2021), an
observational study performed in patients undergoing euploid frozen embryo transfer. Many …

Research question Does additional supplementation with oral dydrogesterone improve
reproductive outcomes in patients with low serum progesterone concentrations on the day of …