I’m pregnant. How can chlamydia affect my baby? March 17, 2020 01:00 Updated Untreated chlamydial infection during pregnancy is linked to: preterm labor premature rupture of membranes low birth weight eye infection or pneumonia in your newborn Related articles How do I know if I have chlamydial infection? I’m pregnant. How does gonorrhea affect my baby? How often should I get tested?