Normal Gestation

Question 1

Tiny cystic structure implanted within the echogenic decidua

Answer 1

Intradecidual sign

Question 2

Normal sac has an echogenic border greater than ____ mm thick, which represents chorioresidual reaction

Answer 2

2mm

Question 3

Normal gestational sac is visualized by transabdominal approach by what week

Answer 3

5 weeks

Question 4

Evident in about 85% of normal pregnancies. It is produced by visualization of 3 layers if decidua in early pregnancy

Answer 4

Double decidual sac sign

Question 5

Refers to endometrium of pregnant uterus

Answer 5

Decidua

Question 6

Lines the endometrial cavity

Answer 6

Decidua vera

Question 7

Covers the gestational sac

Answer 7

Decidua capsularis

Question 8

Contributes to the formation of placenta at the site of implantation

Answer 8

Decidua basalis

Question 9

Growth rate in mean sac diameter

Answer 9

> 1.2 mm/day

Question 10

If yolk sac is 2-6 mm in diameter, it is always present when MSD is _____ on transabdominal us

Answer 10

> /= to 20

Question 11

If yolk sac is 2-6 mm in diameter, it is always present when MSD is _____ on transvaginal US

Answer 11

> /= 16 mm

Question 12

Where does the embryo develop?

Answer 12

Within the amniotic space

Question 13

Yolk sac can be found in the

Answer 13

Chorionic fluid space

Question 14

Excellent evidence of intrauterine pregnancy

Answer 14

Well-visualized double sac

Question 15

A spherical cystic structure that is connected to the midgut of the embryo by a thin stalk, the vitelline duct

Answer 15

Yolk sac

Question 16

Normal diameter of yolk sac

Answer 16

2-6 mm

Question 17

Remnant of the connection of the vitelline duct to the distal ileum

Answer 17

Meckel diverticulum

Question 18

Earliesr site of blood cell formation in the embyro

Answer 18

Yolk sac

Question 19

Yolk sac is generally seen between what GA

Answer 19

5-12 weeks

Question 20

Earliest demonstration of embryo is the ______, produced by the amniotic sac and yolk sac with the embryonic disc between them

Answer 20

Double bleb sign

Question 21

Develops on the ovary at the site of the dominant follicle from which ovulation occurred

Answer 21

Corpus luteum

Question 22

Secretes estrogens, progesterone and other hormones that are essential for establishing and maintaining pregnancy

Answer 22

Corpus luteum

Question 23

Trimester of pregnancy wherein it includes cystic appearance if rhombencephalon and herniation of the gut into the base of umbilical cord

Answer 23

First

Question 24

At what GA does the hindbrain forms a prominent cystic structure that becomes the normal fourth ventricle

Answer 24

6-8 weeks

Question 25

Double bleb sign is formed by the

Answer 25

Yolk sac and amniotic sac

Question 26

Cyst with intense ring of vascularity (ring of fire)

Answer 26

Corpus luteum

Question 27

At what GA does the midgut herniates into the base of the umbilicus forming a physiologic omphalocele which is 6-9 mm in size

Answer 27

9-11 weeks

Question 28

Occurence of vaginal bleeding and uterine cramping with a closed cervical OS

Answer 28

Threatened abortion

Question 29

Presents with cervical dilatation and fetal or placental tissues within the cervical os

Answer 29

Inevitable abortion

Question 30

Refers to presence of residual products of conception within the uterus

Answer 30

Incomplete abortion

Question 31

Fetus has died, but remains in the uterus

Answer 31

Missed abortion

Question 32

Defined as 3 or more successive spontaneous abortions

Answer 32

Habitual abortion

Question 33

Pregnancy in which the embryo has died and is no longer visible or never developed

Answer 33

Anembryonic pregnancy or blighted ovum

Question 34

A gestational sac is considered to be abnormal if it demonstrates the following

Answer 34

``` Large size without an embryo or yolk sac Distorted shape Irregular contour Thin or weak choriorecidual reaction Absence of double decidual sac Abnormal position ```

Question 35

Strong evidence of abnormal sac development

Answer 35

Gestational sac of less than 1 mm/d MSD

Question 36

Cardiac activity should be detected at what embryo size

Answer 36

More than 5mm

Question 37

Major cause of pregnancy related maternal deaths

Answer 37

Ectopic pregnancy

Question 38

Most common site of ectopic pregnancy

Answer 38

Isthmus

Question 39

Concurrent intrauterine and extrauterine pregnancies

Answer 39

Heterotopic pregnancy

Question 40

US finding in ectopic pregnancy that include demonstration of an extrauterine gestational sac appearing as a fluid-containing structure with an echogenic ring

Answer 40

Tubal ring sign

Question 41

Common finding in the bleeding pregnant patient before 20 weeks GA. Believed to develop because of venous bleeding from separation of margin of placent

Answer 41

Subchorionic hemorrhage

Question 42

Subchorionic hemorrhage is commonly seen beneath the

Answer 42

Chorion

Question 43

Polypoid or pedunculated mass of retained placental tissues has been termed

Answer 43

Placental polyp

Question 44

Echogenic mass within the uterine cavity following a spontaneous or induced abortion

Answer 44

Retained products of conception