Cockroaches lay their eggs in dark, safe places. Since they don’t like people to disturb them, they choose places where they won’t be disturbed. These places include the back of cupboards and drawers, and kitchens and bathrooms. In addition to hiding in these areas, cockroaches lay eggs on clothing, in sink bottoms, and in wall crevices. A female cockroach can lay eggs for up to ten months before she lays her first hatchling.
The place where cockroaches lay their eggs depends on the type of cockroach you have. Female cockroaches tend to lay their eggs near food and water sources, so cleaning up this area should be a priority. The location of a cockroach nest is also important, as cockroaches prefer a warm, humid environment. Some myths about cockroaches’ eggs, including the myth that they lay their eggs in the dead of an adult cockroach, have been around for decades. A few of them are based on misconceptions about the egg sac.
The American roach will lay up to 14 egg cases during her lifetime. The incubation period of these eggs depends on the temperature, but they can take anywhere from 37 to 103 days to hatch. The female cockroach will carry the egg casing around for up to 24 hours, after which she will deposit it into a dark, secure place. It will not leave the casing alone, but it will use a secretion called an ootheca to deposit her egg casing.