BILOBED PLACENTA: A bilobed placenta also referred as bipartite placenta, is a variation in placental morphology and refers to a placenta separated into two near equal-sized lobes. If more than two lobes are present, it is termed a trilobed, four-lobed and so on. If the second lobe is smaller than the main lobe (with the umbilical cord insertion), then the smaller lobe is termed a succenturiate lobe. Epidemiology The estimated incidence is at up to ~4% of pregnancies. Pathology It is thought to result from localized placental atrophy as a result of poor dedicualisation or vascularization of a part of the uterus (dynamic placentation theory) 5. Associations velamentous insertion of the cord Radiographic features Antenatal ultrasound May be sonographically seen as two separate placental discs of nearly equal size. The cord usually attaches to a thin connecting rim of chorionic tissue which bridges the two lobes. Less commonly the cord may insert into one of the lobes. Complications it carries an increased incidence of type II vasa previa it may increase the incidence of postpartum hemorrhage due to retained placental tissue Differential diagnosis If more than one lobe of the placenta is seen in an antenatal scan consider: succenturiate lobe: accessory lobe(s) smaller in size than the main lobe twin pregnancy with two placentas Best Fertility Care Center, Ashwini Hospital Moondrumavadi K.Pudur Madurai -07 , Maternal and Child Health Care .Advanced Fertility Care Center.
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