The last phase of spermatogenesis involves spermatid elongation (spermiogenesis), where
the nucleus is remodeled by chromatin condensation, the excess cytoplasm is removed and …

Contents Early embryonic development, implantation and maintenance of a pregnancy are
critically dependent on an intact embryo‐maternal communication. So far, only few signals …

Control of self-renewal and differentiation of human ES cells (hESCs) remains a challenge.
This is largely due to the use of culture systems that involve poorly defined animal products …

Human embryonic stem (hES) cells are pluripotent cells derived from the inner cell mass
cells of blastocysts with the potential to maintain an undifferentiated state indefinitely. Fully …

Hyaluronic acid (HA) plays a vital role in the extracellular matrix of neural tissues. Originally
thought to hydrate tissues and provide mechanical support, it is now clear that HA is also a …

Hyaluronan (HA) is a non-sulphated glycosaminoglycan polymer naturally occurring in
many tissues and fluids of mammals, including the reproductive system. Its biosynthesis by …

In the absence of the maternal genital tract, preimplantation embryos can develop in vitro in
culture medium where all communication with the oviduct or uterus is absent. In several …

[Frontiers in Bioscience 16, 261-276, January 1, 2011] 261 Hyaluronan and mesenchymal
stem cells: from germ layer to cartilage a Page 1 [Frontiers in Bioscience 16, 261-276, January …

Two experiments were conducted to determine whether addition of hyaluronan to culture
medium could improve survival of bovine embryos after vitrification or following embryo …

Epigenetic perturbations are assumed to be responsible for phenotypic abnormalities of
fetuses and offspring originating from in vitro embryo techniques. We studied 29 viable Day …