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 …

Importance To date, recurrent implantation failure (RIF) has no clear definition and no clearly
identified impaired function. Hence, the term RIF is currently used somewhat haphazardly …

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 …

The use of frozen embryo transfer cycles has exponentially increased in the last few years.
Optimization of endometrial preparation protocols before frozen embryo transfer is …

Over the past decade, the use of frozen-thawed embryo transfer (FET) treatment cycles has
increased substantially. The artificial ('programmed') cycle regimen, which suppresses …

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 Which factors impact on clinical pregnancy rate (CPR) and live birth
rates (LBR) in euploid frozen embryo transfer (eFET) cycles? Design Retrospective …

Research question What should be the optimal route of luteal support in programmed frozen
embryo transfer (FET) cycles? Design This was a randomized, parallel, phase IV pilot trial …

Infertility affects one in six couples, with in vitro fertilization (IVF) offering many the chance of
conception. Compared to the solitary oocyte produced during the natural menstrual cycle …