Chlamydia during pregnancy is a bacterial sexually transmitted infection that can affect maternal reproductive health and newborn well-being. Because symptoms may be absent, screening and appropriate medical care are important during pregnancy. Understanding transmission risks, available treatments, and preventive measures helps expectant parents make informed decisions and supports healthier outcomes for mothers and babies.
Chlamydia is a sexually transmitted infection caused by the bacterium Chlamydia trachomatis. During pregnancy, an untreated infection may increase the risk of certain complications and can be transmitted to a baby during vaginal delivery. Many infected individuals experience no noticeable symptoms, making prenatal screening and timely medical evaluation important. Healthcare professionals can diagnose the infection through appropriate testing and prescribe pregnancy-compatible antibiotics to treat it.
Chlamydia may affect pregnancy and newborn health if the infection remains untreated. Transmission can occur when a baby passes through an infected birth canal during delivery. However, not every baby exposed to chlamydia develops an infection, and appropriate maternal treatment helps reduce the risk of transmission.
Potential complications and symptoms include:
Newborn conjunctivitis: Babies may develop eye redness, swelling, and discharge, typically appearing between five and twelve days after birth.
Infant pneumonia: Chlamydia can cause pneumonia in young infants, commonly developing between one and three months of age. Symptoms may include a persistent cough, rapid breathing, and difficulty feeding.
Pregnancy complications: Maternal chlamydia has been associated with outcomes such as preterm birth and low birth weight, although risks vary and associations do not establish that infection directly causes every outcome.
Absence of symptoms: Pregnant individuals may have no obvious signs of infection, and exposed newborns may initially appear healthy. Medical screening remains important even when symptoms are absent.
Early recognition helps healthcare professionals arrange appropriate testing and treatment. Parents should seek prompt medical assessment if a newborn develops eye discharge, persistent coughing, breathing difficulties, or feeding problems.
Screening and treatment are important components of prenatal care. Healthcare professionals may recommend chlamydia testing at the first prenatal visit for pregnant individuals younger than 25 and for older individuals with increased risk factors. Repeat testing may be recommended during pregnancy when the risk of infection continues or when an earlier infection was identified.
Important medical and preventive measures include:
Diagnostic testing: A healthcare professional may use a nucleic acid amplification test, commonly performed on a urine sample or a vaginal or cervical swab, to detect the infection.
Pregnancy appropriate antibiotics: Azithromycin is a recommended treatment during pregnancy. Amoxicillin may be used as an alternative in certain circumstances. Medication selection and dosage should be determined by a qualified healthcare professional.
Follow up testing: A test of cure is generally recommended approximately four weeks after treatment during pregnancy. Repeat testing around three months later is also recommended because reinfection is common.
Partner treatment: Sexual partners should be evaluated and treated as appropriate. Sexual activity should be avoided until seven days after single-dose treatment or until a seven-day treatment course has been completed, and until partners have also been treated.
Newborn evaluation: Healthcare professionals should be informed of maternal infection during pregnancy so they can assess the newborn's risk and arrange evaluation if symptoms develop.
Untreated chlamydia can have consequences for both maternal and newborn health, but screening, appropriate antibiotics, and follow-up care can substantially reduce preventable risks. Pregnant individuals should discuss testing and treatment with their healthcare provider and avoid taking antibiotics without medical guidance.