What is chorioamnionitis?
Chorioamnionitis [chor-y-oh-am-nee-oh-NY-tis] is an infection of the placenta and
the amniotic fluid. Only a few women get it, but, it is a common cause of preterm
labor and delivery.
What causes chorioamnionitis?
Chorioamnionitis is most often caused by bacteria commonly found in the vagina. It
happens more often when the bag of waters (amniotic sac) is broken for a long time
before birth. This lets bacteria in the vagina move up into the uterus.
Who is at risk for chorioamnionitis?
You are more likely to have this infection if:
- Your bag of waters (amniotic sac) breaks long before you actually deliver
- You have a long labor
- You have frequent vaginal exams during labor
- This is your first pregnancy
- You have a sexually transmitted infection or other vaginal infection
- You use alcohol or tobacco
- You have internal fetal monitoring
- You get epidural anesthesia during labor
- You have group B strep
What are the symptoms of chorioamnionitis?
Symptoms may be a little different for each person. They may include:
- Fast heart rate in mother and baby
- Tender or painful uterus
- A bad smell from the amniotic fluid
The symptoms of chorioamnionitis can seem like other health problems. Always see your healthcare
provider for a diagnosis.
How is chorioamnionitis diagnosed?
Your provider will ask about your past health. He or she will give you a physical
exam. He or she may be able to diagnose chorioamnionitis just by your symptoms. You
may also need a lab test to check for infection.
Your healthcare provider may suggest a test called amniocentesis, although this test
is not routinely done for chorioamnionitis. During this test, your healthcare provider
uses a needle to take a small amount of amniotic fluid for testing.
How is chorioamnionitis treated?
Your healthcare provider will figure out the best treatment for you and your baby
- Your overall health and health history
- How far along in your pregnancy you are
- How sick you are
- How well you and your baby can handle specific medicines, procedures, or therapies
- How long the condition is expected to last
- Your opinion or preference
Antibiotics are used to treat chorioamnionitis as soon as the infection is found.
Your healthcare provider may encourage you to deliver your baby early. This can prevent
complications for you and your baby. You may need to keep taking antibiotics after
your baby is born.
What are the complications of chorioamnionitis?
Chorioamnionitis can cause a dangerous blood infection in the mother called bacteremia.
This can cause the baby to be born early. It can also cause serious complications
in the newborn. This includes infection (such as pneumonia or meningitis), brain damage,
Can chorioamnionitis be prevented?
If your bag of waters breaks early (premature rupture of membranes), antibiotics lowers
the chance of chorioamnionitis. It is also helps limit the number of vaginal exams
before and during labor.
When should I call my healthcare provider?
If your membranes rupture, tell your healthcare provider right away. Other symptoms
that call for urgent care include:
- Fast heart rate
- Tender or painful uterus
- Bad-smelling amniotic fluid
Key points about chorioamnionitis
- Chorioamnionitis is an infection of the placenta and the amniotic fluid.
- It happens more often when the amniotic sac is broken for a long time before birth.
- The major symptom is fever. Other symptoms include a fast heart rate, tender or painful
uterus, and a bad smell from the amniotic fluid.
- Chorioamnionitis can cause complications for the mother and the baby.
- You may be given antibiotics if you have premature rupture of the membranes. This
can reduce the risk for chorioamnionitis.
Tips to help you get the most from a visit to your healthcare provider:
- Know the reason for your visit and what you want to happen.
- Before your visit, write down questions you want answered.
- Bring someone with you to help you ask questions and remember what your provider tells
- At the visit, write down the name of a new diagnosis, and any new medicines, treatments,
or tests. Also write down any new instructions your provider gives you.
- Know why a new medicine or treatment is prescribed, and how it will help you. Also
know what the side effects are.
- Ask if your condition can be treated in other ways.
- Know why a test or procedure is recommended and what the results could mean.
- Know what to expect if you do not take the medicine or have the test or procedure.
- If you have a follow-up appointment, write down the date, time, and purpose for that
- Know how you can contact your provider if you have questions.