From Romulus and Remus—the myth of the twin brothers who founded the city of Rome—to the synchronized speech of Australia's ...

The yolk sac is also the first site of hematopoeisis, with embryonic red blood cells and macrophages visible in the yolk sac as early as 2 weeks' gestation. Neutrophils, platelets, and lymphocytes ...

Ultrasonography of the umbilical remnants is commonly conducted in neonatal foals undergoing veterinary assessments (Figure 2). Umbilical structures (urachus, vein and arteries) can be imaged at the ...

A sac-like structure formed by day 10 in over 90% of the PGAs. These gradually expanded in size over 90 days, without being given any further signals.

A structure resembling a yolk sac, which nourishes the embryo, also appeared attached to the amniotic sac, and then disappeared after two weeks.

The problem of amniotic chromosome counting errors is caused by chromosomal ambiguity. For example, chromosomal overlap results in misidentification of the overlap point in chromosomal skeleton images ...

In contrast, the mouse placenta exhibits labyrinthine architecture, which means it has a complex structure with an intermingled network of maternal and foetal blood vessels, and the yolk sac is the ...

They may share anywhere from half to all of the DNA. Plus, even though semi-identical twins form in the same amniotic sac, they don’t have to share the same gender.

Leaking amniotic fluid can occur for several reasons: Preterm premature rupture of membranes (PPROM): This condition occurs when the amniotic sac breaks before 37 weeks of gestation.