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(Amnionitis; Chorioamnion Infection; Intra-amniotic Infection)


Chorioamnionitis is an infection in the membranes and amniotic fluid that surrounds the fetus and protects it.

The baby is delivered right away to protect the mother and baby from harm.

An Infection in the Uterus
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The infection is caused by bacteria. It can be passed to the baby.

Risk Factors

Young women are at greater risk. The risk is also higher for women who:


Some women may not have problems. Women who do have problems may have:

  • A high fever
  • A belly that is tender to the touch
  • Odor and discharge from the vagina


The infection may be diagnosed based on the symptoms.

Testing may not be done when the infection is found during labor. However, the diagnosis may be confirmed with:

  • Blood tests
  • Amniocentesis—amniotic fluid samples
  • Biopsy—tissue samples from around the baby


The baby will need to be delivered right away. A cesarean section may be needed if:

IV antibiotics are given to fight the infection. A baby with the infection will also need them.


Your doctor will avoid vaginal exams during later stages of pregnancy or after your water breaks. Antibiotics may be given to some women.


American Congress of Obstetricians and Gynecologists 

American Pregnancy Association 


Canadian Women's Health Network 

Society of Obstetricians and Gynaecologists of Canada 


American College of Obstetricians and Gynecologists (ACOG). Committee on Obstetric Practice. Committee Opinion No. 712: Intrapartum Management of Intraamniotic Infection. Obstet Gynecol. 2017 Aug;130(2):e95-e101

Chorioamnionitis. EBSCO DynaMed website. Available at: . Updated April 24, 2019. Accessed July 2, 2019.

Committee on Practice Bulletins—Obstetrics. ACOG Practice Bulletin No. 199: use of prophylactic antibiotics in labor and delivery. Obstet Gynecol. 2018;132(3):e103-e119.

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