1. The process of fertilization in cockroach is internal.
2. Male and female cockroaches come together by their posterior phallomeres.
3. The spermatophores are transferred to the genital chamber of female cockroach.
4. Sperms released from the spermatophore reach the spermatheca.
5. The eggs are discharged from both the ovaries alternately into the common oviduct and pass into the genital chamber.
6. Sperms coming from the spermatheca fertilize the eggs in the genital chamber.
