Lecture 4A p2

Question 1

How is yolk sac measured

Answer 1

Inner to inner ap measurement

Question 2

Usual shape of yolk sac

Answer 2

Circular

Question 3

Max diameter of YS is _____mm visualized by wekk _____

Answer 3

5.6 mm

10 weeks

Question 4

Yolk sac is very important in

Answer 4

Early embryo development

Question 5

Functions of the yolk sac (3)

Answer 5

Providing nutrients to early embryo
Vitelline duct connect YS to embyro
Production of albumin, AFP and other proteins
Embryonic hematopoiesis

Question 6

Wher does hematopoiesis continue after the yolk sac?

Answer 6

Liver in 8th week

Question 7

The yolk sac will lose function as

Answer 7

The placenta takes over

Question 8

Week 6-10 embryo is aka

Answer 8

Fetal pole

Question 9

At 6 weeks embryo appears ______ to the yolk sac

Answer 9

Adjacent

Question 10

Embyro is ____-_____mm when first visualized

Answer 10

2-4mm

Question 11

what is Crown rump length (CRL)

Answer 11

Main measurement used in first trimester

Most accurate estimate of gestational age

Question 12

CRL is length of

Answer 12

Embryo or fetus from top of its head (crown) to bottom (rump)

Question 13

CRL measurement should not include

Answer 13

Yolk sac or extremities

Question 14

Is CRL used in 2nd trimester

Answer 14

No

Question 15

Embryo CRL 6.5 weeks

Answer 15

5mm

Question 16

Embryo CRL 7-8 weeks

Answer 16

11-16mm

Question 17

Embryo CRL 8-9 weeks

Answer 17

17-23

Question 18

Embryo CRL 9-10 weeks

Answer 18

23-32mm

Question 19

What may be seen at 8-9 weeks

Answer 19

Limb buds

Question 20

What may be seen by week 9-10

Answer 20

Movement

Question 21

Firest organ to function in the embryo

Answer 21

Primitive heart

Question 22

The primitive heart begins to pump at ____ weeks

Answer 22

5

Question 23

Cardiac activity can be seen on embryo >____mm

Answer 23

> 5mm

Question 24

Cardiac activity must be seen if fetal pole = _____mm

Answer 24

7mm

Question 25

BPM 5 WEEKS

Answer 25

100-115 BPM

Question 26

9 WEEKS BPM

Answer 26

170-180BPM

Question 27

Bpm DECREASES soon after

Answer 27

160-170

Question 28

2nd and 3rd trimeter bpm

Answer 28

110-160