What is a key feature of succenturiate placenta?

A key feature of succenturiate placenta is the presence of an accessory lobe of fetal villi. This condition occurs when there is an additional lobe or lobe(s) of placental tissue that is separate from the main body of the placenta, yet still maintains vascular connections with it. This accessory lobe can vary in size and may be located away from the primary placental mass, which can sometimes complicate delivery if it is not identified, as remnants may remain in the uterus after birth.

The increased placental size option refers to the general condition of placentomegaly rather than specifically to succenturiate placenta, which does not necessarily result in an enlarged main placenta. Similarly, the option regarding the placenta being located at the cervix pertains to a condition known as placenta previa, which differs entirely from the concept of succenturiate placenta. Lastly, the presence of multiple vessels in the umbilical cord is related to variations such as a three-vessel cord versus a two-vessel cord but is not a defining characteristic of a succenturiate placenta.