Placentation Practice Questions

Question 1

At what stage of pregnancy do tertiary chorionic villi develop?

Accepted Answer

Day 17

Answer

Day 28

Answer

Day 25

Answer

Day 15

Question 2

Which immunoglobulin provides natural passive immunity to a newborn through the placenta?

Accepted Answer

IgG

Answer

IgA

Answer

IgE

Answer

IgD

Question 3

Which structure do cytotrophoblasts invade during implantation?

Accepted Answer

Decidua basalis

Answer

Decidua capsularis

Answer

Decidua vera

Answer

Decidua parietalis

Question 4

At 30 days of intrauterine life, what is the expected developmental milestone?

Accepted Answer

Optic vesicle appears

Answer

Heart starts beating

Answer

Cerebellum develops

Answer

Pinna appears

Question 5

The morula stage consists of how many cells?

Accepted Answer

28 to 32 cell stage

Answer

4 to 8 cell stage

Answer

12 to 16 cell stage

Answer

50 to 60 cell stage

Question 6

Which of the following statements about placental hormones is true?

Accepted Answer

hCS plays a role in maternal glucose metabolism.

Answer

hCG levels remain consistently high throughout pregnancy.

Answer

The luteal-placental shift occurs around 10-12 weeks of gestation.

Answer

Progesterone production requires fetal adrenal precursors.

Question 7

All are true about uteroplacental circulation except:

Accepted Answer

A mature placenta has 150 ml of blood in the villi system and 350 ml of blood in the intervillous space

Answer

The villi depend on the maternal blood for their nutrition

Answer

Blood in the intervillous space is completely replaced 3-4 times per minute

Answer

Intervillous blood flow at term is 500-600 ml per minute

Question 8

Which of the following statements about the placenta is correct?

Accepted Answer

The placenta produces estrogen.

Answer

The placenta has 2 arteries and 1 vein.

Answer

The placental artery carries deoxygenated blood from the fetus to the placenta.

Answer

Wharton's jelly is found in the umbilical cord.

Question 9

A 30-year-old G2P1 is undergoing an elective repeat caesarean section at term. The infant is delivered without any difficulties, but the placenta cannot be removed easily because a clear plane between the placenta and uterine wall cannot be identified. The placenta is removed in pieces. This is followed by uterine atony and haemorrhage. All of the following are true regarding the condition except:

Accepted Answer

If placenta invades muscle and reaches serosa it is known as placenta increta

Answer

May require obstetric hysterectomy

Answer

Absence of Nitabuch's membrane

Answer

Previous LSCS is a predisposing factor

Question 10

Which is correct about the diagram shown?

Accepted Answer

A= Allantois, B= Connecting stalk, C= Yolk Sac, D= Chorion with villi

Answer

A= Amnion, B= Connecting stalk, C= Yolk Sac, D= Intraembryonic mesoderm

Answer

A= Amnion, B= Connecting stalk, C= Yolk Sac, D= Extraembryonic Celom

Answer

A= Amnion, B= Connecting stalk, C= Allantois, D= Chorion with villi

Placentation — MCQs

Placentation — MCQs

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