Placenta Previa
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Risk Factors for placenta previa
advanced maternal age ( >35 yrs) previous cesarean multiparity short interval between pregnancy uterine injury hx of uterine surgery
Signs and Symptoms of placenta previa
bright red painless bleeding during 3rd trimester signs of fetal distress ( placenta tearing ) fetus may be transverse or breeched diagnosis with ultrasound 1st bleeding episode may be 29-30 weeks (rarely life threatening)
Marginal
edge of placenta close to os
Low-lying
not true prevue; placenta not in os, but implanted in lower uterine segment
Complete or Total
os is completely covered
Partial
part of os is covered
What is placenta previa?
placenta implanted in lower uterine segment instead of in the upper posterior
