Early development of embryo and fetus

Question 1

When can fetal heart tone be heard with a stethoscope

Answer 1

Wk 22

Question 2

Categories of the decidua

Answer 2

Decidua basalis
Decidua capsularis
Decidua vera or parietalis

Question 3

Which trophoblast secrete hcg

Answer 3

Cytotrophoblast

Question 4

Name of part of villi im contact with decidua basalis

Answer 4

Chorion frondosum

Question 5

Which two structures form the placenta

Answer 5

Decidua basalis

Chorion frondosum

Question 6

Composition of the centre of Chorionic villus

Answer 6

Mesoderm
Fetal vessels
Branches of umbilical artery and vein

They are covered by cyto and synctio

Question 7

At what week is the placenta fully formed

Answer 7

week 12

Question 8

Functions of placenta

Answer 8

FRESPEN

Question 9

Which glands arise from ectoderm

Answer 9

Adrenal medulla
Posterior pituitary
Pineal

Question 10

Which glands arise from mesoderm

Answer 10

Adrenal cortex

Gonads

Question 11

Which glands arise from endoderm

Answer 11

Thyroid
Parathyroid
Anterior pituitary
Thymus

Question 12

Anatomical variations of placenta

Answer 12

Succenturiate lobe
Circumvallate placenta
Bipartite placenta
Tripartite placenta

Question 13

Where is the umbiical cord derived from

Answer 13

Embryonic stalk

Question 14

Composition of umbilical cord

Answer 14

• 2 arteries
• The left umbilical vein
• Fetal connective tissue called Wharton’s jelly
• The tip of allantoic diverticulum

Question 15

define long and short cord

Answer 15

long - 100cm

short - <30cm

Question 16

Abnormalities of cord..define

Answer 16

True knots
Single artery
Battledore insertion
Velamentous insertion

Question 17

Fetal sac consists of and where they are derived from

Answer 17

Outer chorion - from trophoblast

Inner amnion - inner cell mass

Question 18

Amniotic volume for oligo and polyhydramnios

Answer 18

oligo - <500mls

poly - >2L

Question 19

Watch video of fetal circulation

Answer 19

yeah

Question 20

At what day does the inner cell mass develops into a bilaminar germ layer

Answer 20

Day 8 -9

Question 21

When do kidneys begin to make urine

Answer 21

14 weeks

Question 22

When can fetal sex be identified on ultrasound

Answer 22

20 weeks

Question 23

When does fetal kicks begins and hair and nails begin to grow

Answer 23

18 weeks

Question 24

Which trophoblast secretes proteolytic enzymes that create numerous filled cavities in the decidua called lacunae

Answer 24

Syncytiotrophoblast

Question 25

Volume of amniotic fluid at

• 10 weeks
• 20 weeks
• 30 weeks
• Term

Answer 25

• 10 weeks………..30 mls
• 20 weeks…………300 mls
• 30 weeks…………600 mls
• Term…………800mls