The belly button, or navel, is a scar that forms after the umbilical cord is detached shortly after birth. The umbilical cord ...

New findings lay to rest a debate over the origin and cell lineage of macrophages found in mouse brains -- they come from progenitor cells in the embryonic yolk sac and are self-renewing, and are not ...

Scientists have found a way to study early embryonic development without real embryos. Using CRISPR, they programmed stem cells to self-organize into structures mimicking early embryos. The cells show ...

Researchers have discovered that the earliest days of embryo development have a measurable impact on a person's future health and aging. Researchers from the University of Adelaide have discovered ...

In the latest episode of The Baldwins, the entrepreneur, 41, who shares her seven children with husband Alec Baldwin, candidly shared she was "terrified" she was "gonna kill" another embryo if she ...

But the silken sac resembled candyfloss, the likes of which Mr Bay, an arachnid aficionado, had never seen before. Mr Bay had been out for a night walk in western Singapore with some friends when ...

A remnant of the yolk sac merges in the forming embryo into the primitive gut. The role of the yolk sac in early gestation is to supply the embryo with oxygen and nutrients until the formation of ...

An important finding is that de novo NAD synthesis occurs in an extra-embryonic tissue, the visceral yolk sac, before the liver develops in the embryo. It is suggested that lack of this yolk sac ...

As division continues, some cells divide into the growing mass, distinguishing cells that form the embryo (epiblast) from those that form the placenta (trophectoderm). Further cell divisions lead to ...

and the hypoblast (extra-embryonic endoderm), the precursor tissue of the yolk sac (Wamaitha and Niakan, 2018). Once the hypoblast, epiblast, and trophoblast have been specified, the human blastocyst ...