Despite the worldwide increase in frozen embryo transfer, the search for the best protocol to
prime endometrium continues. Well-designed trials comparing various frozen embryo …

Objective To investigate the association between luteal serum progesterone levels and
frozen embryo transfer (FET) outcomes. Design Systematic review and meta-analysis …

STUDY QUESTION Is there a serum progesterone (P) threshold on the day of embryo
transfer (ET) in artificial endometrium preparation cycles below which the chances of …

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 …

Objective To analyze the impact on live birth rates (LBRs) of the individualized luteal phase
support (termed iLPS) in patients with low serum progesterone (P) levels compared with …

Progesterone is the ovarian steroid produced by the granulosa cells of follicles after the LH
peak at mid-cycle. Its role is to sustain embryo endometrial implantation and ongoing …

Over the past decade, the application of frozen-thawed embryo transfer treatment cycles has
increased substantially. Hormone replacement therapy and the natural cycle are two …

Progesterone plays a key role in implantation. Several studies reported that lower luteal
progesterone levels might be related to decreased chances of pregnancy. This systematic …

STUDY QUESTION Which factors are associated with low serum progesterone (P) levels on
the day of frozen embryo transfer (FET), in HRT cycles? SUMMARY ANSWER BMI, parity …

Research question Will luteal phase rescue with additional progesterone increase serum
progesterone concentrations and improve reproductive outcomes in patients with low serum …