In the present study a total of 300 pregnant women were evaluated, 200 women with bad obstetrics history (BOH) and 100 clinically normal women. Cervical culture studies, as well as serological evaluation was carried out in each woman. It was noted that among the various microbial agents detected, the presence of genital mycoplasmas, chlamydia, Toxoplasma gondii and cytomegalovirus was significant. Foetal outcome could be noted in some of the BOH patients. Toxoplasmosis was associated with complete abortion (38%), stillbirths (6%), premature delivery (16%) and congenital anomalies (6%). Cytomegalovirus infection was associated with complete abortion (41.66%), preterm delivery (33.33%) and congenital anomalies (8.33%). Ureaplasma infection in BOH patients resulted in preterm delivery with premature rupture of membranes in 45 per cent of women and complete abortion in 35 per cent.