Chapter 6 Placental Abnormalities

Question 1

At term, a typical placenta weighs how many grams?

Answer 1

470g

Question 2

The maternal surface is the basal plate, which is divided by clefts into portions termed -

Answer 2

Cotyledons

Question 3

The placenta is annular, and a partial or complete ring of placental tissue is present.

Answer 3

Ring-shaped placenta, a variant of placenta membranacea

Question 4

Central portion of a placental disc is missing

Answer 4

Placenta fenestrata

Question 5

Placenta may infrequently form as separate, nearly equally sized discs

Answer 5

Bilobate placenta or bipartite placenta

Question 6

All or nearly all of the fetal membranes are covered with villi.

Answer 6

Placenta membranacea

Question 7

Defined as placental thicker than 40mm and commonly results from striking villous enlargment

Answer 7

Placentomgealy

Question 8

During pregnancy, the normal placenta increases its thickness at a rate of how many mm per week?

Answer 8

1mm

Question 9

Chorionic plate fails to extend to the periphery and leads to chorionic plate that is smaller than the basal plate.

Answer 9

Extrachorial placentation