egg sac

The organism’s various states of evolution — as an egg sac or the Facehuggers that hatch from them — are back too.

The female will then store the sperm in structures called spermathecae and eventually construct an egg sac where the eggs remain until they hatch the following spring or summer, said Sarah Crews, from the California Academy of Sciences’ department of entomology.

One egg sac can carry hundreds of eggs.

It can also spread when the spiderlings first hatch from the egg sac.

Like the praying mantis who's male through the whole thing, and then has this egg sac, but Mom and I still call it "he."