1st Trimester

Question 1

linea terminalis

Answer 1

pubic symphisis to sacral prominatory

Question 2

When will the first evidence of pregnancy be detected?

Answer 2

4.5 weeks gestational age

Question 3

What is the first sign of pregnancy songraphically?

Answer 3

intra-decidual/gestational sac at 4.5-5 weeks gestational age

Question 4

What is the first definative finding of an intrauterine pregnancy?

Answer 4

yolk sac at 5-6 weeks gestational age and a MSD of 8 mm

Question 5

When is the embryo visualize on US?

Answer 5

6+ weeks and a MSD of 16 mm

Question 6

What is MSD?

Answer 6

Mean Sac Diameter

Question 7

What is the double decidual sac?

Answer 7

decidua vera and decidua capsularis (now debated)

Question 8

What is required for IUP?

Answer 8

yolk sac or embryo

Question 9

At what quant is a yolk sac usually seen?

Answer 9

5000 mlU/ml

Question 10

The center of the yolk sac should be…

Answer 10

anechoic

Question 11

Cardiac activity is usually seen by what crown rump length (CRL)?

Answer 11

5 mm

Question 12

When should CRL not be used?

Answer 12

When the embryo can flex and extend

Question 13

With CRL of <5 mm what should the HR be?

Answer 13

> 80-90 BRP

Question 14

With CRL of >5 mm what shoud the HR be?

Answer 14

> 110 BPM

Question 15

Verify in two planes that an IUP is surrounded by at least… of myometrium.

Answer 15

5 mm

Question 16

What is the definitve diagnosis for preganancy failure?

Answer 16

embryo > 5mm without cardiac activity

Question 17

Definitive sign of ectopic pregnancy

Answer 17

Gestational sac with yolk sac or embryo outside of uterine cavity

Question 18

With free fluid in either cul de sac, where else should you look for fluid?

Answer 18

Morrison’s pouch

Question 19

How can you distinguish interstitial ectopic from intrauterine?

Answer 19

thinning of myometrium around the pregnancy to less than 5 mm