In a longitudinal study published in Scientific Reports, researchers investigate the effect of maternal physical activity on the size and growth of the yolk sac during early pregnancy. To this end, ...

Epidemiology and Infection, Vol. 103, No. 3 (Dec., 1989), pp. 577-585 (9 pages) Graded doses of live and heat-killed cells of Campylobacter jejuni were injected into the yolk-sac of 5-day-old chick ...

Gastrulation, the process where an embryo reorganizes itself from a hollow sphere into a multilayered structure, is considered a 'black box' of human development. This is because human embryos are ...

The median age at diagnosis was 26 years, with a male predominance (96.3%). Common histological subtypes included seminoma (34.3%) and yolk sac tumor (31.3%). First-line chemotherapy comprised ...

Embryo-like structures – dubbed hematoids by the experts that developed them – were created using human stem cells.

Microglia are the brain’s resident innate immune cells, that originate from early yolk sac progenitors and enter the developing central nervous system (CNS) ...

Pregnancy scans can be exciting yet nerve-wracking, especially during the first trimester when everything is new. And, Ultrasounds are a common part of prenatal care. They help doctors check on the ...

Scientists have grown a human embryo-like structure in a lab which replicates very early human development - including the production of blood stem cells. The lab-grown embryo model could help ...