Chlamydia is a common sexually transmitted bacterial infection that affects about 10 percent of pregnant women. But because the infection is often symptomless, many women don't even know they have it -- which is why many doctors automatically test for it at the first prenatal visit. Chlamydia is usually easily treated with antibiotics that are safe during pregnancy.
If the infection goes unchecked, it can pose some health problems for you and your baby, including an increased risk of miscarriage and preterm delivery. And babies born to women with untreated chlamydia can be infected during a vaginal delivery, leading to eye infections or even pneumonia, which can be very serious in newborns.
If you're worried that you may have chlamydia or aren't sure whether you've been tested, ask your doctor to test again. Since the infection is easily cleared up with medication, there's no reason to put your baby at risk.