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Vaginal pH (Substance Concentration, Fluid)

Published: August 9, 2026Updated: August 16, 2026

This test measures the acidity or alkalinity of fluids from your vagina. It helps assess vaginal health and balance, often linked to infections or hormonal changes.

Quick summary

["Your vaginal pH can signal infections, hormonal shifts, or overall vaginal health."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
14525-0
Short code
RUBV Ag Skin Ql IF
Synonyms
RUBV Ag Skin Ql IF
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
if
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why It’s Done

Doctors may order a vaginal pH test to diagnose conditions like bacterial vaginosis, yeast infections, or to monitor changes during pregnancy or hormonal treatments. It’s also used in pre-surgical evaluations or after certain medical treatments.

What to Expect

A healthcare provider collects a small sample of vaginal fluid using a swab. The sample is tested in a lab to determine its pH level. This is usually a quick, painless procedure with no preparation needed.

What the Results Mean

A healthy vaginal pH typically ranges between 3.8 and 4.5. Higher pH levels (closer to 5 or above) may indicate bacterial vaginosis or other infections, while lower levels (below 3.8) could suggest yeast overgrowth or hormonal imbalances.

Common Causes of Abnormal Results

Changes in pH can occur due to infections (like bacterial vaginosis or candidiasis), hormonal fluctuations (e.g., during menstruation, pregnancy, or menopause), sexual activity, douching, or certain medications.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Vaginal pH

Frequently asked questions

How often should I get this test?
Vaginal pH testing is often done as part of a routine evaluation for infections, during pregnancy, or if you experience symptoms like unusual discharge, odor, or itching. Your doctor will determine if and how frequently you need it based on your health needs.
What does a high vaginal pH mean?
A high vaginal pH (above 4.5) may suggest bacterial vaginosis or other infections. It can also indicate an imbalance in vaginal bacteria. Your doctor may recommend further testing or treatment to address the underlying cause.
Can diet affect vaginal pH?
Dietary habits, such as consuming certain foods or beverages (e.g., garlic, citrus, or alcohol), can temporarily alter vaginal pH. However, it’s not a primary driver of long-term pH changes. Maintaining good hygiene and avoiding irritants can help support vaginal health.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy