Recurrent implantation failure refers to failure to achieve a clinical pregnancy after transfer of
at least four good-quality embryos in a minimum of three fresh or frozen cycles in a woman …

Background Advances in embryo culture media have led to a shift in in vitro fertilisation (IVF)
practice from cleavage‐stage embryo transfer to blastocyst‐stage embryo transfer. The …

Reproduction is required for the survival of all mammalian species, and thousands of
essential'sex'genes are conserved through evolution. Basic research helps to define these …

STUDY QUESTION Can we use morphokinetic markers to select the embryos most likely to
implant and are the results likely to be consistent across different clinics? SUMMARY …

BACKGROUND In order to select the best blastocyst for transfer, in humans, three
morphological parameters have routinely been used, ie degree of blastocoele expansion …

Objectives Blastocyst transfer in assisted reproduction techniques could be advantageous
because the timing of exposure of the embryo to the uterine environment is more analogous …

A variety of evolutionary processes has led to the development of different organs to ensure
that internal fertilization occur successfully. Fallopian tubes are a particularly interesting …

The aim of this study was to assess the ability of three individual blastocyst morphology
parameters–expansion and hatching (EH) stage, inner cell mass (ICM) grade and …

STUDY QUESTION What is the proper way of assessing the effect of progesterone elevation
(PE) on the day of hCG on live birth in women undergoing fresh embryo transfer after in vitro …

Over the last decade the use of frozen–thawed embryo transfer has substantially increased,
and currently up to one in two embryos transferred has been cryopreserved. To support …