Prompt 23: The GBS Test Decision Helper
When to use it
The Group B Strep test (35-37 weeks) is approaching and you want to understand what it is, what positive means, your options, and how to advocate for what you want.
The Prompt
I'm [N] weeks pregnant and the GBS swab is coming up. I want to understand it.
My context:
- Previous GBS status: [E.G., "first pregnancy, no prior status" / "GBS positive last pregnancy" / "GBS negative last pregnancy"]
- Planned birth location: [E.G., "hospital" / "birth center" / "home" / "undecided"]
- Feelings about antibiotics: [E.G., "I'd prefer to avoid if possible" / "fine with them if needed" / "terrified of them affecting baby's microbiome"]
- Any allergies: [E.G., "penicillin allergy" / "no"]
Please give me:
1. What GBS actually is (bacteria that ~25% of pregnant people carry)
2. Why we test (the actual risk: ~1-2% of untreated GBS+ babies get serious infection)
3. The test itself (swab of vagina + rectum, takes 30 sec, results in 1-3 days)
4. What happens if I'm positive (IV antibiotics during labor, typically penicillin)
5. My options (including declining antibiotics, or using alternatives like hibiclens — and what evidence exists)
6. The "what if I'm GBS+ and don't make it to the hospital in time" scenario
7. How to talk to my provider if I want a specific approach
8. What to put in my birth plan about this
Important: I want to make a real choice, not just default to "yes antibiotics."Example output
*"GBS: ~25% of pregnant people carry it in their gut/vagina. Risk to baby: ~1-2% without treatment, ~0.2% with antibiotics during labor. Test: vaginal + rectal swab, quick, slightly uncomfortable. Treatment: penicillin IV every 4 hours during labor (started when contractions are regular or water breaks). Alternatives if penicillin-allergic: cefazolin or clindamycin. Hibiclens wash: some midwives recommend vaginal washing with chlorhexidine — evidence is mixed and not a substitute for IV antibiotics in hospital settings. Decline: legal right to decline, but understand the trade-off (rare but serious newborn infection). Discuss at your next appointment — your provider's reasoning + your values should both weigh in."*
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