Intra-amniotic infection

[Sonia]

Intra-amniotic infection is infection of the tissues around the fetus, such as the fluid that surrounds the fetus (amniotic fluid), the placenta, the membranes around the fetus, or a combination.

Intra-amniotic infection increases the risk of problems in the woman and in the fetus.
Women usually have a fever and often have pelvic pain and a vaginal discharge.
Usually, doctors can diagnose the infection by doing a physical examination, but sometimes amniotic fluid must be analyzed.
Women are given antibiotics and drugs to lower body temperature, and delivery is scheduled as soon as possible.

Pregnancy complications, such as intra-amniotic infection, are problems that occur only during pregnancy. They may affect the woman, the fetus, or both and may occur at different times during the pregnancy. However, most pregnancy complications can be effectively treated.
Intra-amniotic infection typically develops because bacteria from the vagina enter the uterus and infect the tissues around the fetus. Normally, mucus in the cervix, the membranes around the fetus, and the placenta prevent bacteria from causing infection. However, certain conditions can make it easier for bacteria to breach these defenses. For example, the membranes around the fetus may rupture too soon (called premature rupture of the membranes). Rarely, infection occurs when internal fetal monitoring is done. For this procedure, doctors monitor the fetus by inserting an electrode (a small round sensor attached to a wire) through the woman’s vagina.
The more time that passes between when the membranes rupture and delivery occurs, the more likely intra-amniotic infection is to develop, particularly if doctors or midwives do many pelvic examinations. Such examinations may introduce bacteria into the vagina and uterus.
Having bacteria that can cause infections in the genital tract also makes intra-amniotic infections more likely. Women may not know that these bacteria are present, particularly if they have not had routine prenatal care, when tests for these bacteria would have been done.
Intra-amniotic infection is also more likely if

Labor starts early (preterm labor).
The amniotic fluid contains meconium (the dark green stool that is produced by the fetus before birth and that is usually only expelled after birth).
Labor lasts a long time.

Intra-amniotic infection can increase the risk of the following problems in the fetus:

Preterm delivery or preterm premature rupture of the membranes (intra-amniotic infection can cause as well as result from these problems)
Too little oxygen in the blood around the time of delivery
Infections, such as a bodywide infection (sepsis), pneumonia, or meningitis
Seizures
Cerebral palsy
Death

Intra-amniotic infection can increase the risk of the following problems in the woman:

A bloodstream infection
Need for a cesarean delivery
Bleeding after delivery (postpartum hemorrhage)
A collection of pus (abscess) around the uterus
Infection of incisions made during delivery
Blood clots in the legs
Placental abruption

Rarely, if an intra-amniotic infection is not treated, women may develop septic shock (life-threatening low blood pressure caused by a serious bodywide response to infection), disseminated intravascular coagulation (a blood clotting disorder that causes blood clots and bleeding), and acute respiratory distress syndrome.