Good to knowOne result rarely tells the whole story. Your provider looks at your results together with your symptoms, exam, and other tests.
What the test is
About 1 in 4 pregnant people carry GBS without symptoms.
Why it's done
- Routine at 36 to 37 weeks of pregnancy
Getting ready and what happens
- No preparation is needed.
How the test is done
- A swab of the vagina and rectum, sometimes self-collected.
What the results mean
Positive
You'll get IV antibiotics during labor to protect your baby.
Questions to ask your provider
- What do my results mean for me?
- Do I need to repeat this test or have other tests?
Related conditions
Related medicines
Sources
Last updated 2026-11-13.