DO Not Wait. 

Cockroaches are known for their rapid reproduction rates, which vary by species. Here’s a summary of how quickly different types of cockroaches breed:

• German Cockroach: This species is the fastest reproducer. A female can produce 4 to 8 oothecae (egg cases) in her lifetime, with each containing 30 to 48 eggs. The eggs typically hatch within 20 to 30 days, and females can start laying eggs just three weeks after hatching. This leads to a potential population explosion, as a single female can contribute to thousands of offspring in a short time frame.
• American Cockroach: A female can produce 6 to 14 oothecae over her lifetime, with each capsule containing 14 to 16 eggs. The eggs take about 6 to 8 weeks to hatch, and the nymphs mature into adults in approximately 6 months to a year.
• Brown-Banded Cockroach: This species lays about 10 to 18 eggs per ootheca, producing around 13 to 14 capsules throughout her life. They mature in about 90 days, allowing for quick population growth under favorable conditions.
• Oriental Cockroach: This species is slower in reproduction compared to others. A female produces around 8 oothecae, each containing about 16 eggs. The eggs take about two months to hatch, and nymphs take roughly 6 months to a year to mature.

Overall, the combination of rapid egg production and quick maturation allows cockroaches to establish large populations rapidly, particularly in warm and humid environments.