Roaches create an ootheca, which is a hardened egg case. Some species, including the American cockroach, place their ootheca on objects and can hold up to 20 embryos.

A female cockroach mates and carries around the eggs or ootheca, which is pillow-shaped and has up to 48 eggs, depending on the species. ... American cockroaches.

Spotting a cockroach scuttling across your kitchen floor is pretty disgusting, and most of us would instinctively try to stamp on it before it hides somewhere we cannot reach it. It is even more ...

Typically found in sewers and drains, female American cockroaches ... "Once the first ootheca opened it was all systems go," Markham said. Small then spent seven hours filming each shot.

Both roaches, though, are hardy survivors, and their genes hold the keys as to why. In the new study, researcher Sheng Li of South China Normal University and colleagues found that American ...

Genes in the American cockroach's DNA prompt wound healing and tissue regrowth. (In 2016, a study found Madagascar hissing cockroaches can grow bigger testicles when they need them.) ...

Taking the American cockroach as an example, they have three life stages: the ... and they are encased in secretions produced by the colleterial glands to form a protective pouch called an ootheca.