Background: Recently, it has been found that exposure of sperm to PVP may cause submicroscopic changes in sperm structure and the sperm nucleus. The PVPinduced nuclear damage may have been due to breakdown of sperm membranes. Consequently, it is probable that exposure of sperm to PVP may impair embryo development. There are apparently no detailed reports regarding the specific effects of PVP on...

objective: after the introduction of assisted reproductive techniques, human embryos were officially introduced into laboratories and now thousands of them are cryopreserved in such settings. embryonic stem cells and the future application of such cells in the treatment of disease opened the door to further research on human embryos. these developments raise many ethical issues, some of which h...

Embryo quality is a key determinant of the success IVF. Although focus has been on selecting best embryo for transfer, classification low-grade blastocysts (LGB) in existing scoring systems received less attention. This worrisome; freezing allows optimal use all created embryos, thus maximizing cumulative live birth rate, which arguably most important outcome infertile couples. A PubMed search ...

The continuous growth of the plant embryo is interrupted during the seed maturation processes which results in a dormant seed. The embryo continues development after germination when it grows into a seedling. The embryo growth phase starts after morphogenesis and ends when the embryo fills the seed sac. Very little is known about the processes regulating this phase. We describe mutants that aff...

The objectives were to determine if early in gestation (less than day 30) an embryo in the ipsilateral horn increases the survival rate of an embryo in the contralateral horn and if later in gestation (greater than day 30) the presence of two embryos adversely affects the survival of both embryos in cattle. The experiment involved surgical embryo transfer. Sixty Holstein heifers were assigned t...

BACKGROUND New techniques in assessing oocytes and embryo quality are currently explored to improve pregnancy and delivery rates per embryo transfer. While a better understanding of embryo quality could help optimize the existing "in vitro fertilization" (IVF) therapy schemes, it is essential to address the economic viability of such technologies in the healthcare setting. METHODS An Embryo-D...

BACKGROUND IVF cycles which result in only one good quality embryo, and a second poor quality embryo present a dilemma when the decision involves transferring two embryos. The aim of this study was to evaluate whether a poor quality embryo has a negative effect on a good quality embryo when transferred along with a good quality embryo. METHODS We retrospectively evaluated in vitro fertilizati...