Female Blattella germanica lays eggs in special colloidal capsules, forming egg pods. The way Blattella germanica lays eggs is that after the female lays the egg sheath, she drags it at the abdominal end until the nymph hatches out of the egg sheath and then lays eggs, and then falls off from the mother. In-egg embryos constantly get necessary water and nutrition from the mother during development, and the egg sheath is carried by the mother worm, so it can be better protected. If the egg sheath falls off prematurely, the egg cannot hatch.