Now all seven of the sacrificial slabs had an egg sack quivering by its side.

Everyone else backed away from the writhing woman and the remaining egg sacks.

Females respond to stress by dropping the egg sacks they are carrying.

She keeps them in an egg sack under her body until the eggs hatch.

The eggs then eat through the egg sack and move out in all different directions.

The white egg sacks are highly visible now, even from several feet away.

They'd attack us if they could, but their first concern is moving their egg sacks away from the flames.

It's seems to be some sort of egg sack.

The outer is the cocoon-sac and the inner part is the egg sack.

"One cannot put baby spiders back inside the egg sack."