Some existing laws and some proposed legislation regulating the practice of in vitro fertilization (IVF) limit its availability to infertile couples. Dawson and Singer question whether it is reasonable to so restrict access to IVF, and examine some of the medical and social circumstances in which IVF and the related procedures of embryo freezing, embryo biopsy, and embryo transfer might be use...

The aim of this study was to develop an in vitro embryo culture medium without either fetal calf serum or BSA, using various growth factors and cytokines (GFs-CYKs; IGF-I, IGF-II, bFGF, LIF, GM-CSF, TGF-β1, and PDGF-BB), and other molecules with surfactant and embryotrophic properties, such as recombinant albumin (RA) and hyaluronan (HA). The first part of the study was dedicated to define the ...

an efficient method for producing doubled haploid plants of date palm ( phoenix dactylifera l.) was established using in vitro colchicine treatment of anthers. to this study male inflorescences were harvested in the appropriate developmental stage. separated anthers after one day cold (4°c) pretreatment, in uninucleate stage of microspore were transferred to the modified y 3 medium containing d...

Conceiving a child by way of embryo selection and tissue matching to benefit a sick sibling is generally justified on the grounds that as well as the potential to save the sick child, there is a benefit for the new baby. The new baby is selected so he or she will not have the disease suffered by the first child. It is not possible, however, to select against conditions for which there is no tes...

The creation of embryos for research use has drawn a great deal of criticism. It is difficult to defend an ethical distinction between what one can do to "spare" embryos and what one can do to "research" embryos. The strongest ground on which to argue against the creation of embryos for research is a symbolic one, having to do with respect for human life. Ronald Dworkin's work in Life's Dominio...

This research try to analyse the juridical statute of the human embryos in accordance with two recent laws which contain ordesr what affects him: the new Law of assisted reproduction technology -Law 14/2006, of 26 may (LRA)-, and the law of biomedical investigation -Law 14/2007, of 3 july (LIB)-, because the embryos in vitro is considered devoid of the quality what give the human dignity, why i...

introduction: to improve the development of embryo in vitro several attempts have been made, including the application of leukemia inhibitory factor (lif). this factor plays an important role in embryo development and has been shown to enhance in vitro development rate in sheep and mice. there is controversy regarding the effect of lif on the different stages of embryo development. the aim of t...