What Is a Yolk Sac? A yolk sac is a small pouch made from thin membranes. The yolk sac is one of the first things to develop during pregnancy and one of the first things your healthcare provider will ...

Rachael has a degree in Zoology from the University of Southampton, and specializes in animal behavior, evolution, palaeontology, and the environment. Rachael has a degree in Zoology from the ...

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, ...