Free tool
BV Partner Questions: What the Evidence Says
Whether a partner should be treated for bacterial vaginosis (BV) is contested. A 2025 NEJM trial found treating male partners too cut 12-week BV recurrence from 63% to 35%, and ACOG now advises considering it for recurrent BV, while CDC's 2021 guidance does not recommend routine partner treatment. Ask your clinician which fits you.
How to use it
- Find your question in the first column.
- Read what the evidence says, how strong it is, and the year of the source, since advice on partners changed in 2025.
- Take the questions that apply to you to your clinician; partner treatment is a prescription decision.
- If you are pregnant or have fever or pelvic pain, contact a clinician promptly rather than waiting.
Reference
| Question | What the evidence says | Evidence strength | Source and year |
|---|---|---|---|
| Can a male partner pass BV-linked bacteria back? | CDC notes that BV-associated bacteria can be found on male genitals. Reviewers attribute BV recurrence to bacteria or biofilm persisting after antibiotics and to reinfection from sexual partners. | Moderate: lab findings and expert review | CDC STI Treatment Guidelines, 2021; Vodstrcil et al., BMC Med, 2021 |
| Does treating a male partner lower recurrence? | A 2025 NEJM trial found treating male partners too cut 12-week BV recurrence from 63% to 35%. Partners took an oral antibiotic plus a cream applied to the penis; the trial was open-label, in monogamous couples, and stopped early for benefit. Earlier trials that used oral treatment alone did not show a benefit. A 2026 network meta-analysis pooling trials also linked partner treatment to fewer recurrences. | Strong for this combined regimen: one randomized trial plus pooled analysis | Vodstrcil et al., N Engl J Med, 2025; CDC summary of earlier trials, 2021; Gardella et al., J Low Genit Tract Dis, 2026 |
| What do guidelines say now? | They differ. CDC's 2021 guidance says routine treatment of sex partners is not recommended. In October 2025, ACOG advised considering combined oral and topical treatment for male partners of adults with recurrent, symptomatic BV. | Contested: guidance changed after the 2025 trial | CDC, 2021; ACOG Clinical Practice Update, 2025 |
| What about female partners? | BV is often shared between female partners, and CDC says BV can spread between them. No studies have tested treating female partners to prevent recurrence. ACOG advises shared decision-making for patients with same-sex partners. | Limited: no treatment trials | CDC, 2021 and 2023; ACOG, 2025 |
| Is BV a sexually transmitted infection? | CDC calls BV a common vaginal condition. It can occur without sex, but it rarely affects people who have never had sex, and new or multiple partners, douching and not using condoms raise the risk. How sex triggers BV is not known. | Strong for the risk factors; the cause is not fully understood | CDC, 2023 |
| Can BV come from a toilet seat, bedding or a pool? | No. CDC says you cannot get BV from toilet seats, bedding or swimming pools. | Public-health guidance | CDC, 2023 |
| Do condoms help? | CDC lists using condoms, limiting the number of sex partners and not douching among basic steps that may lower the risk of BV. | Public-health guidance | CDC, 2023 |
| Can a partner pass on a yeast infection? | CDC says uncomplicated yeast infections are not usually acquired through sex and data do not support treating partners. A minority of male partners develop red, itchy areas on the penis and benefit from treatment. | Public-health guidance | CDC STI Treatment Guidelines, 2021 |
Why the advice changed
CDC's 2021 guidance rested on earlier trials, including one of oral antibiotics alone for male partners, that found no benefit. The 2025 trial added a cream for the partner and found fewer recurrences, and ACOG updated its advice in October 2025.
Questions to take to your clinician
Is my BV recurrent? Should my partner be treated, and who prescribes it? Should we avoid sex or use condoms during treatment? What should I do if it comes back?
Get care promptly
CDC says treating BV during pregnancy is very important, because BV is linked with early birth and low birth weight. Fever or pelvic pain also needs prompt care.
How this tool works
This is a fixed evidence table. Each answer is taken from CDC guidance, ACOG's 2025 clinical practice update, or PubMed-verified studies, with the source year shown because guidance on partner treatment changed in 2025 and the sources disagree. Evidence strength describes the type and amount of research, not whether partner treatment is right for you. It has no inputs.
Frequently asked questions
Can a man get BV?
BV is a change in the balance of vaginal bacteria, so men do not get BV itself. CDC notes that BV-associated bacteria can be found on male genitals, which is why researchers have tested treating male partners to reduce recurrence.
Why do I keep getting BV with the same partner?
Reviewers attribute BV recurrence to bacteria or biofilm persisting after antibiotics and to reinfection from sexual partners. Ask your clinician whether partner treatment fits your situation; ACOG advised considering it in 2025 for recurrent, symptomatic BV.
Should my partner be treated for BV?
It depends, and sources disagree. A 2025 trial and ACOG's 2025 update support considering treatment for male partners when BV keeps returning, while CDC's 2021 guidance does not recommend routine partner treatment. For female partners, there are no treatment trials yet.
Can I give BV to my partner?
CDC says BV can spread between female sex partners. With male partners, BV-linked bacteria can be shared and may contribute to recurrence, though men do not get BV itself. Condoms are one of CDC's basic risk-lowering steps.
Is BV a sexually transmitted infection?
CDC calls BV a common vaginal condition. It can happen without sex, but rarely affects people who have never had sex, and new or multiple partners raise the risk. Having BV can raise the chance of getting other STIs.
Can a man get a yeast infection from a partner?
CDC says uncomplicated yeast infections are not usually acquired through sex, and data do not support treating partners. A minority of male partners develop red, itchy areas on the penis and benefit from treatment, so they should see a clinician.
What if I am pregnant and have BV symptoms?
Contact your clinician promptly. CDC says treating BV during pregnancy is very important, because BV is linked with early birth and low birth weight. Partner questions can wait until you have been seen.
Sources
- CDC: Bacterial Vaginosis, STI Treatment Guidelines (2021)
- CDC: About Bacterial Vaginosis (updated 2023)
- CDC: Vulvovaginal Candidiasis, STI Treatment Guidelines (2021)
- ACOG news release: concurrent sexual partner treatment for recurrent BV (October 2025)
- Vodstrcil et al., N Engl J Med 2025: male-partner treatment to prevent BV recurrence (PubMed)
- Vodstrcil et al., BMC Med 2021: drivers of BV recurrence and partner treatment (PubMed)
- Gardella et al., J Low Genit Tract Dis 2026: network meta-analysis of BV recurrence prevention (PubMed)
This tool gives general information for adults and does not diagnose or treat any condition. It is not a substitute for advice from a clinician. If you have severe symptoms, fever, or are pregnant, contact a healthcare professional.