Abruptio placentae
Premature separation of the placenta from the uterine wall
Usually occurs after 20 weeks’ gestation, most commonly during the third trimester
Cause of bleeding during the second half of pregnancy
Classified according to degree of placental separation and severity of maternal and fetal symptoms (see Degrees of placental separation in abruptio placentae)
Possible complications: hemorrhage, shock, renal failure, and disseminated intravascular coagulation (DIC)
Also called placental abruption
Causes
Exact cause unknown
Traumatic injury
Amniocentesis
Chronic or gestational hypertension
Multiparity
Short umbilical cord
Dietary deficiency
Smoking or cocaine use
Advanced maternal age
Pressure on the vena cava from an enlarged uterus
Diabetes mellitus
Signs and symptoms
Mild abruptio placentae (marginal separation)
Mild to moderate vaginal bleeding
Vague lower abdominal discomfort
Mild to moderate abdominal tenderness
Fetal monitoring indicating possible uterine irritability
Strong and regular fetal heart sounds
Moderate abruptio placentae (about 50% placental separation)