Ob/gyn Ch 47 - The Normal 1St Trimester

Front 1

Gestational age adds _______ to conceptual age.

Back 1

2 weeks

Front 2

_____ days after conception, during inplantation process, conceptus is called a _____.

Back 2

12, zygote

Front 3

From time of implantation until end of _____ week menstration age, conceptus called _______.

Back 3

10th, embryo

Front 4

After first 10 weeks, embryo is called a _____.

Back 4

fetus

Front 5

Embryologists state time in ________, also know as embryolgic age; conception is first day of pregnancy.

Back 5

conceptual age

Front 6

Trophoblastic cells become _______.

Back 6

chorin

Front 7

Implantation into the uterine decidua is completed within _____ days of fertilization.

Back 7

12

Front 8

____________ is the first sign of pregnancy.

Back 8

double dicidual sign.

Front 9

The embrionic disk has 3 layers:

Back 9

endoderm, mesoderm, ectoderm

Front 10

The ______ is the most accurate measurement during the first 12 weeks of pregnancy.

Back 10

CRL

Front 11

3 layers of implantation:

Back 11

decidua basalia, decidua capsularis, decidua parietalis

Front 12

Normal gestational sac can be consistently demonstrated when hCG level is _____ mIU/ml in transvanginal scanning.

Back 12

1800

Front 13

Normal IUP < 7 weeks demonstrates doubling of quantitive maternal serum hCG levels every ______ days

Back 13

2-3

Front 14

At _______ hCG levels plateau and subsequently decline while gestation continues.

Back 14

8- 9 weeks

Front 15

Lowe levels of _____, a pregnancy associated plasma protien-A, may indicate complications in pregnancy.

Back 15

PAPP-A

Front 16

1st trimester exam components:
evaluate uterus/adnexa for?
measure ____ or _____.
presence/absence of ______.
fetal _____.
evaluate uterus, adenxa, & ____.

Back 16

gestational sac
embryo or sac
cardiac activity
#
cul-de-sac

Front 17

The interface between the decidua capsular is and the echogenic highly vascularized dicidua on opposite wall of endometrial cavity forms the _______.

Back 17

double decidual sac sign

Front 18

First intra gestational sac anatomy seen is _____________.

Back 18

secondary yolk sac

Front 19

Between ________ of gestation amniotic cavity, membrane, chorionic cavity, yolk sac, and embryo should be seen.

Back 19

5 1/2 - 6 weeks

Front 20

Yolk sac is initially attached to embryo via _____.

Back 20

yolk stalk

Front 21

Around ______ weeks gestation the yolk sac, which lies between amniotic and chorionic mebrane, detatches from yolk stalk.

Back 21

8

Front 22

When measuring a yolk sac you measure from ______ to _____. Normal diameter should not exceed _____ mm.

Back 22

inner, inner
6

Front 23

In twin pregnancies, ______ yolk sac signifies monochorionic, monoamniotic pregnancy, ____ yolk sacs signify diamniotic, monochorionic or diamniotic, dichorionic pregnancy.

Back 23

one, two

Front 24

Yolk sac reabsorbs and is no longer seen by ______.

Back 24

12 weeks

Front 25

Heart motion should be detected around _____ weeks, when CRL is ____ mm.

Back 25

5 1/2, 3

Front 26

_________ is the initial dumping ground for waste until the placenta takes over.

Back 26

chorionic cavity

Front 27

Fusion of membranes, ____________, occurs at approximately 12-16 weeks.

Back 27

chorioamnionic fusion

Front 28

The spine, which develops from ectoderm, initially evolves from primitive _________, which closes about _____ weeks of gestation.

Back 28

neural tube, 6

Front 29

By ____ weeks the midline falx is formed and echogenic choroid plexus tissue is seen in lateral ventricles.

Back 29

9

Front 30

At ____ weeks, further evolution of cerebellum, medulla, and medulla oblongota encloses the rhomboid fossa to for 4th ventricle and part of cerebral aqueduct of Sylvius.

Back 30

10th

Front 31

Hands and feet should be completely formed by the end of the ____ week.

Back 31

10th

Front 32

Calcification of _____ begins at about 8 weeks and ______ at 9 weeks.

Back 32

clavicle, frontal bones

Front 33

Until about ______ week of gestation, midgut loop continues to grow and rotate before descending into fetal abdomen at about ___ week.

Back 33

10th, 11th

Front 34

After _______ weeks of gestation, echogenic umbilical cord mass is no longer seen and echogenic bowel is seen within fetal abdomen.

Back 34

12th

Front 35

Heart starts to beat around ____ days, or _____ weeks.

Back 35

36, 5 1/2-6

Front 36

2 parameters for so no graphic gestational dating:

Back 36

CRL
gestational sac size

Front 37

Gestational sac is measurements are obtained in both ______ and ________ sonographic planes.

Back 37

sagittal, coronal/semicoronal

Front 38

CRL + 42 days =?
divide by 7 = ?

Back 38

gestational age in days
age in weeks

Front 39

Nuchal translucency must be done before ______ weeks.

Back 39

12