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PLACENTA MEMBRANACEA |
This results from persistence of the villi of the chorion laeve as well as the chorion frondosum, producing a large, thin placenta that entirely surrounds the fetal membranes.
- Also referred to as placenta diffusa.
- All of the fetal membranes are covered by functioning villi and the placenta develops as a thin membranous structure occupying the entire periphery of the chorion.
- Seldom interferes with fetal nutrition.
- Is associated in nearly all cases by early antepartum bleeding and either abortion or premature labor. This is due to the fact that that part of the placenta is necessarily previa.
- The diagnosis can be made by ultrasound when the placenta is uniformly distributed over the membranes and of reasonable thickness.
- Placenta may require manual separation, as expulsion may be incomplete and result in postpartum hemorrhage.
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Case 2 |
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