Rare Birth Defect Leaves Boy With Giant Red Balloon-Like Sac on His Back
About one in every 1,000 people is born with spina bifida, but few develop this specific form of the condition.
They Were Made Without Eggs or Sperm. Are They Human?
Created from stem cells, without eggs, sperm, or a womb, the embryo model had a yolk sac and a proto-placenta, resembling a ...
The Scientist11mon
The First Human Embryo Model From Embryonic Stem Cells
While monitoring the ESC-based embryo model’s growth for important structures, they captured an image eight days after culture that included the epiblast, yolk sac, extra-embryonic mesoderm, and ...
JSTOR Daily8y
The Morphology and Affinities of Gnetum
The usually abortive ovules of the staminate strobili frequently possess embryo-sacs and may produce seeds ... It is not possible to relate the structures of an Angiosperm embyro-sac to archegonia.
Nature6y
Figure 1 - Primordial gut.
a: Lateral view of a 4-week embryo showing the relationship of primordial gut to yolk sac. b: Drawing of median section of the embryo showing the early digestive system and its blood supply.
Daily11d
Yolk Sac can reliably detect pregnancies destined for loss as early as 6 weeks, finds study
The yolk sac (YS) is the initial embryonic structure visible on ultrasound within the gestational sac (GS), typically ...
Medscape17d
Life Inside the Womb: Implications for Newborn and Infant Nurses
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 ...