2nd week of development

Question 1

2 layers of inner cell mass

Answer 1

Hypoblast and Epiblast

Question 2

Cuboidal cells of ICM

Answer 2

Hypoblast

Question 3

Columnar cells of ICM

Answer 3

Epiblast

Question 4

Amnion or amniotic cavity is formed by

Answer 4

Epiblast

Question 5

External layer of Amniotic cavity is

Answer 5

EEM - Somatic or parietal layer

Question 6

Inner layer of Amniotic cavity is

Answer 6

Amniogenic cells

Question 7

Dorsal aspect of inner cell mass

Answer 7

Epiblast

Question 8

Ventral aspect of ICM

Answer 8

Hypoblast

Question 9

Heuser’s membrane

Answer 9

Hypoblast

Question 10

Exocoelomic membrane is

Answer 10

Hypoblast

Question 11

Primary YS is formed by

Answer 11

Hypoblast + Flattened squamous cells.

Question 12

Lining of primary YS

Answer 12

Flattened squamous cells.

Question 13

Double Bleb sign on USG is seen in

Answer 13

2nd week of Development

Question 14

What are the Double Bleb’s on USG

Answer 14

Primary YS and Amniotic cavity.

Question 15

2 layers of OCM

Answer 15

Cytotrophoblast and Syncytiotrophoblast.

Question 16

Extra embryonic mesoderm is present btw

Answer 16

Cytotrophoblast and Inner cell mass

Question 17

Layer btw Cytotrophoblast and Inner cell mass is

Answer 17

EEM

Question 18

EEM is formed by

Answer 18

Primary yolk sac

Question 19

Hormone factory

Answer 19

Syncytiotrophoblast.

Question 20

When can HCG be first detected

Answer 20

on the first day of missed period / 8-9 days after fertilisation.

Question 21

Low HCG is seen in

Answer 21

Ectopic or Missed abortion.

Question 22

High HCG is seen in

Answer 22

Molar pregnancy and Multiple pregnancy.

Question 23

Cytotrophoblast ____ nucleated and ____defined membrane

Answer 23

Single and Well defined.

Question 24

Syncytiotrophoblast is _____ nucleated and ____defined membrane

Answer 24

Multi and Not well defined.

Question 25

Primary Chorionic villi is formed by

Answer 25

Cyto and syncytiotrophoblast.

Question 26

Secondary Chorionic villi is formed by

Answer 26

Somatic EEM and Cyto and Syncytiotrophoblast.

Question 27

Chorion is formed by

Answer 27

EEM + Cyto + Syncytio

Question 28

Lacunae is formed in which layer

Answer 28

Syncytio

Question 29

Uteroplacental Circulation is established by

Answer 29

D15

Question 30

Feto- Placental circulation is established by

Answer 30

D17 > D22

Question 31

1st system to develop.

Answer 31

CVS

Question 32

when does primary YS turn into Secondary YS

Answer 32

on being surrounded by Splanchnopleuric EEM

Question 33

Cavitation of EEM result in

Answer 33

Formation on Somatic or parietal and Splanchnic layer of EEM.

Question 34

Connecting stalk

Answer 34

undivided part of EEM.

Question 35

Connecting stalk forms

Answer 35

Umbilicus

Question 36

Umbilicus is formed by

Answer 36

Connecting stalk.