The difference between male and female cockroaches is tough to see unless you get up close to the roach. In the female cockroach, the seventh abdominal segment is divided in two, but it is not divided in the male cockroach.
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In cockroaches we can see two pair of appendages at the tip of the abdomen of the male while female has only one pair of appendage's. Sexes are separate. The female doesn't have well developed wings-Only tiny wing pad's. Male has short wings extending halfway down the abdomen.
Male cockroaches are smaller in size than female&male cockroaches have anal styles from 9th segment of their body while female don't.