Differences between male and female cockroach are
Male Cockroach :
Abdomen is long and narrow.
All nine sterna are visible.
Anal styles are present.
7th tergum covers 8th tergum.
Brood pouch is absent.
Antenna are longer in size.
Wings extend beyond the tip of abdomen.
Female Cockroach :
Abdomen is short and broad.
Only seven sterna are visible.
Anal styles are absent.
7th tergum covers 8th and 9th terga.
Brood pouch is present.
Antenna are smaller in size.