Free radicals, once the preserve of chemists, are now recognized as playing a central role in
many biological systems. They are formed as an inevitable by-product of aerobic respiration …

Culturing of human embryos in optimal conditions is crucial for a successful in vitro
fertilisation (IVF) programme. In addition, the capacity to assess and rank embryos correctly …

The advent of in vitro fertilization (IVF) in animals and humans implies an extraordinary
change in the environment where the beginning of a new organism takes place. In mammals …

The success of clinical IVF was initially compromised by sub-optimal culture conditions,
resulting in impaired embryo development (1–6) and a subsequent loss of viability …

STUDY QUESTION Are the morphokinetics of growing embryos affected by the type of
culture media utilized? SUMMARY ANSWER Morphokinetic parameters used for embryo …

OBJECTIVE: To analyze critically the reasons justifying the choice of two-step protocols
requiring two media for the culture of human preimplantation embryos from the zygote to the …

The delivery of a single, healthy child is the desired outcome of human assisted
reproduction techniques. To attain this goal, there is an increasing movement toward single …

Transfer of human embryos at the blastocyst stage may offer considerable benefits including
an increased implantation rate and a decreased risk of multiple pregnancies; however …

BACKGROUND The majority of research aimed at improving embryo development in vitro
has focused on manipulation of the chemical environment, examining details such as …

The aim of the present study was to examine the effect of culture under 5 and 20% oxygen
on the development, differentiation and viability of zygotes and in-vivo-produced embryos at …