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

No heartbeat at 6 weeks of pregnancy Discover the reasons when to be concerned and steps to take during early pregnancy uncertainty ...

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 ...

Yolk sac (early nutrient source) is present. Fetal pole (early embryo structure) is visible. No symptoms like bleeding or severe cramping. “If these markers are normal, there’s a good chance ...

While the placenta hasn't yet formed, there is a yolk sac which has developed and this provides blood and nourishes your baby. Your embryo might be tiny, but it’s busy! This week, the amniotic ...

A limitation remains that, as in a tail vein injection in a mouse model, this may be a better measure of the ability of disbursed cells to survive in the embryo, and not "native ... to be near the ...

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 ...

During human foetal development, erythropoiesis first occurs in the yolk sac, then in the foetal liver and then, in the third trimester and after birth, in the bone marrow. Nprl3 controls ...

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 ...