
Vaginosi batterica in gravidanza: Cosa devi sapere
Revisione paritaria di Dr Colin Tidy, MRCGPUltimo aggiornamento di Lawrence HigginsUltimo aggiornamento 10 Apr 2026
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Your body goes through a whole host of changes when you’re pregnant - and not all of them are welcome. Bacterial vaginosis - a vaginal infection caused by an imbalance of bacteria in the vagina - can be common when you’re expecting a baby. Although it's not normally dangerous, it has been linked to pregnancy complications. So here's what you need to know about it.
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Cos'è la vaginosi batterica?
Bacterial vaginosis is the most common vaginal infection in women between the ages of 15 to 44. It's common among pregnant women, possibly because of the hormonal changes that take place.
Our bodies contain an array of good bacteria that help keep us healthy. The vagina is colonised by bacteria called lactobacilli which help to keep everything in check and prevent harmful germs (pathogens) from getting inside.
Sometimes, however, the balance of these bacteria can change - and bacteria other than lactobacilli can overgrow in the vagina, causing symptoms such as unusual discharge. This is called vaginosi batterica or BV.
Dr Krishna Vakharia, a GP, says: “Bacterial vaginosis doesn't usually cause problems during pregnancy, but there is a link between BV and some pregnancy complications.”
Research shows that bacterial vaginosis can lead to un travaglio prematuro and birth if left untreated. It has also been linked to low birthweight, a problem associated with an increased risk of infant mortality, developmental problems in childhood, and poorer health in later life. Therefore, it's important to get checked out and treated if you notice any changes to your vagina during la gravidanza.
What are the symptoms of bacterial vaginosis?
Often, there are no symptoms of BV. Some women may notice a change in the normal secretions from the vagina.
"This discharge will usually be white or grey, thin or watery and have a strong, unpleasant fishy smell. You may also have itching, burning, or irritation in the vaginal area," says Vakharia.
It can be challenging to differentiate between normal changes in vaginal discharge during pregnancy and bacterial vaginosis. When you’re pregnant, it’s normal to have more discharge than you normally would. This helps to prevent any infections from travelling up the vagina and into the womb, protecting the baby. However, there are some key differences.
"Normal pregnancy discharge is usually thin, white, and odourless or has a mild, slightly sweet smell. It should not be accompanied by itching, burning, or unusual discomfort," says Vakharia.
Symptoms of bacterial vaginosis:
A thin white or grey discharge.
A strong, fishy smell.
Itching or irritation in your genital area.
Burning when you pee.
What to do if you think you have bacterial vaginosis in pregnancy
If you think you have BV you should make an appointment with your doctor. Make sure you tell your doctor or nurse if you are pregnant, think you might be pregnant, or are allattamento.
More often than not, doctors will diagnose and treat based on the symptoms. Rarely, if the diagnosis is not clear, the doctor may carry out an examination to check your vagina and use a swab to collect a sample to test. This only takes a couple of minutes and may be slightly uncomfortable, but isn’t normally painful. Sometimes, a diagnosis can be made straight away using a piece of paper that changes colour depending on the pH - alkaline/acid balance - of your vagina.
Treatment for bacterial vaginosis
Bacterial vaginosis is treated with antibiotici. An antibiotic cream or gel to use in the vagina may be given instead of antibiotic tablets by mouth.
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Can BV be a sign of pregnancy?
No, bacterial vaginosis (BV) is not a sign of pregnancy. While BV is common among pregnant women due to hormonal changes, its presence does not indicate that you are pregnant.
What specifically causes bacterial vaginosis in pregnancy?
Bacterial vaginosis occurs when the balance of bacteria in the vagina changes. In pregnant women, this is thought to be possibly due to the significant hormonal changes that occur during pregnancy. This imbalance leads to an overgrowth of bacteria other than the beneficial lactobacilli, which can cause symptoms like unusual discharge.
Is bacterial vaginosis dangerous in pregnancy?
While bacterial vaginosis doesn't usually cause problems, there is a link between untreated BV and certain pregnancy complications. Research shows it can lead to premature labour and birth, and has also been linked to low birthweight. Therefore, it's important to get it checked and treated if you notice any changes to your vagina during pregnancy.
What is the treatment for bacterial vaginosis during pregnancy?
If you are diagnosed with bacterial vaginosis during pregnancy, it is treated with antibiotics. This may involve an antibiotic cream or gel applied directly into the vagina, or antibiotic tablets taken by mouth. Your doctor will determine the most suitable treatment for you.
How common is bacterial vaginosis during pregnancy?
Bacterial vaginosis is very common among pregnant women. In fact, it is the most common vaginal infection in women between 15 and 44 years old, and its prevalence in pregnancy is possibly linked to the hormonal changes that occur.
Informazioni sull'autoreVisualizza il profilo completo

Lydia Smith
Scrittore di articoli
BA, MA, MSc
Lydia Smith è una giornalista pluripremiata e scrittrice di articoli che ha scritto ampiamente sulla salute delle donne e sulla salute mentale. Attualmente sta studiando per un MSc in psicologia.
Informazioni sul recensoreVisualizza il profilo completo

Dr Colin Tidy, MRCGP
Medico di base, Autore medico
MBBS, MRCGP, MRCP (Paediatrics), DCH
Il Dr Colin Tidy è un medico del NHS, con sede nell'Oxfordshire.
Storia dell'articolo
Le informazioni su questa pagina sono revisionate da clinici qualificati.
Articolo disponibile anche in Inglese, Tedesco, Spagnolo, Francese, Italiano, Portoghese, Hindi, Ebraico, Arabo, and Svedese.
Next review due: 10 Apr 2029
10 Apr 2026 | Ultima versione
24 maggio 2023 | Pubblicato originariamente
Autore:
Lydia Smith

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