A female oriental cockroach produces an average of eight egg capsules per lifetime. Each egg capsule or ootheca contains about 16 eggs that are lined up vertically, two by two in the egg case. The egg capsule may be carried from 12 hours to five days and then deposited in a warm sheltered environment where food is readily available. The incubation period for the oriental cockroach is a bout 42 to 81 days. The female gives no assistance to the young.
Nymphs go through seven molts before becoming adults, which takes approximately one year.
An adult B. orientalis can live from 34 to 180 days, and pairing takes place at any season. Any area that has a high humidity and a cool temperature should be examined. Crawl spaces, basements, and kitchen and bathroom plumbing can be inspected for dead roaches, egg cases, and fecal smears. Also, any spider webs in these locations can be inspected for cockroach remains. Habits and Habitat Blatta orientalis is common outdoors, and lives in warm damp shady areas near the ground or any area containing natural debris.