Bacteria is the main cause of the genital disorder. Abortion, recurrent abortion and placenta retention are the main disorder accompanying with pregnancy failure. The current study aimed to find the relationship between this disorder and Campylobacter infection and main Campylobacter species related to this disorder. For this purpose, 50 aborted fetuses and vaginal swabs were collected. Case history and multiplex PCR were applied. The result showed that Campylobacter detected at a rate 26% in abortion cases and 61.5% of positive cases of campylobacter spp. are accompanied by placenta retention. The current study revealed that 75% of positive cases of campylobacter spp. accompany with recurrent abortion. According to MPCR test, Campylobacter fetus, Campylobacter jejuni, and Campylobacter coli were detected in a rate of 86.65%, 12.3%, and 0%, respectively.