Tuberculosis during pregnancy: testing and care

By trimester

Weeks 1–13

1st trimester

Known exposure, cough, fever, night sweats, weight loss, or immune suppression should be assessed without waiting for a later trimester. CDC considers TB skin and blood tests safe in pregnancy, and active disease care should not be deferred.

Weeks 14–27

2nd trimester

A positive skin or blood test does not distinguish inactive infection from active disease. Chest radiography and sputum testing may be needed, and a normal infection test does not end the evaluation when symptoms, recent exposure, or HIV keep suspicion high.

Weeks 28–birth

3rd trimester

Before delivery, active TB requires coordination with obstetrics, a TB program, pediatrics, and infection-control staff. For many lower-risk inactive infections, CDC allows deferral until two to three months postpartum, but recent exposure or substantial immune suppression can justify earlier care.

What does the evidence show for tuberculosis?

• CDC distinguishes inactive TB, which causes no symptoms and is not contagious, from active TB disease, which can cause illness and spread to close contacts. A positive skin or blood test alone shows infection; further medical evaluation determines whether active disease is present. 1
• CDC states that TB skin and blood tests are safe during pregnancy and that a positive result may require chest radiography. The blood test has not been fully evaluated specifically in pregnant patients, while the skin test is described as safe and reliable throughout pregnancy. 1
• CDC advises immediate multidrug care for active TB disease during pregnancy. Many patients with inactive infection can defer a regimen until two to three months postpartum, but recent infectious contact or substantial immune suppression can make delay unsafe. The weekly isoniazid-rifapentine 3HP regimen is not recommended in pregnancy. 2
• CDC's diagnostic framework combines history, examination, a skin or blood test, chest radiography, and bacteriologic studies such as sputum smear, nucleic-acid testing, culture, and drug-susceptibility testing. Symptoms or strong exposure risk can justify continued evaluation despite a negative infection test. 3
• A 2021 narrative review reports that delayed recognition of pulmonary or extrapulmonary TB in pregnancy is associated with preterm labor, fetal growth restriction, and stillbirth, while timely recognition and appropriate regimens are associated with better maternal and perinatal outcomes. This synthesis is not a randomized comparison. 4

When should I call my provider about tuberculosis?

Seek same-day medical assessment for a persistent cough, coughing blood, chest pain, fever, drenching night sweats, unexplained weight loss, marked fatigue, or known close contact with infectious TB during pregnancy. Use emergency services for severe breathing difficulty, confusion, collapse, or coughing substantial blood. Tell the facility about possible TB before arrival so airborne precautions can be arranged. When in doubt, call your obstetric team the same day. Early input almost always beats waiting, and the on-call line exists exactly for this.