 [ Symptoms ] how does chlamydia in pregnancy cause a miscarriage  i have recently had a chlamydia test but do not get my results back for a week and a half i have seen all over the internet that chlamydia can cause miscarriage and i am worried sick in case something happens i was wondering how it actually causes miscarriage though as i thought the mucus plug was supposed to stop infections spreading [ Disease ] hi for more good info try google this chlamydia in pregnancy cause a miscarriage nhs the nhs is the uk is medical service and its free or try this just the same google it chlamydia in pregnancy cause a miscarriage mayo clinic or just google this chlamydia in pregnancy cause a miscarriage do hope this helps you good luck