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Created by
Angelica Barba
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Anomalies of the Placenta
Placenta Succenturiata
Placenta Circumvallata
Placenta Accreta
Battledore Placenta
Velamentous Insertion of the Cord
Vasa Previa
Placenta
Succenturiata
weighs approximately 500 g and is 15 to 20 cm in diameter and 1.5 to 3.0 cm thick.
has one or more accessory lobes
not a fetal abnormality
small lobes may be retained in the uterus after birth leading to severe maternal hemorrhage.
Placenta
Circumvallata
the fetal side of the placenta is covered with
chorion.
umbilical cord enters the placenta at the usual midpoint, and large vessels spread out from there.
Placenta Accreta
refers to an unusually
deep
attachment
Hysterectomy or treatment with methotrexate to destroy the still-attached tissue is the recommended treatment of choice.
Battledore Placenta
refers to the cord that is inserted marginally rather than centrally.
This is a rare anomaly and it has no known clinical significance.
Velamentous
Insertion
of
the
Cord
instead of entering the placenta directly, separates into small vessels that reach the placenta by spreading across a fold of amnion.
most commonly found with multiple gestations.
Vasa Previa
- The vessels may tear with cervical dilatation
HYDRAMNIOS
(POLYHYDRAMNIOS)
Hydramnios
is caused by an excessive amount of amniotic fluid
Normal amniotic fluid
500-1200
cc
Hydramnios
2000
cc over
Oligohydramnios less than
300
cc
The amount of amniotic fluid present is controlled in part by fetal urination, swallowing, and breathing
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