Blastomeres of early vertebrate embryos undergo numerous fate choices for division, motility, pluripotency maintenance and restriction culminating in various cell lineages. Tracing blastomere fate ...

It is well known that mature oocytes can reprogram somatic nuclei in the process of nuclear transfer (NT) 1 and remodel male gametes in normal fertilization. An intriguing question is whether ...

A method that can generate human embryonic stem cells without harming embryos? In August biotechnology firm Advanced Cell Technology (ACT) in Worcester, Mass., claimed it had developed just such a ...

Pregnancy rates in women of advanced maternal age undergoing in vitro fertilization (IVF) are disappointingly low. It has been suggested that the use of preimplantation genetic screening of ...

Two new techniques might make it possible to derive stem cells from embryos without destroying them – possibly offering an “ethical” way of harvesting stem cells. The advances, both published online ...