Final Flashcards
Midgut herniation is considered abnormal past ___ weeks.
12
14 according to ppt
When is NT abnormal?
3mm+
When is implantation complete?
Day 23
When does fertilization occur? Where?
24-36 hours after ovulation in the ampulla
Blastocyst burrows about ___ days after fertilization.
7 days
When do the amnion and chorion fuse?
12-16 weeks, 14-16 weeks LMP
Where is the yolk sac located?
chorionic cavity
The yolk sac is visualized endovaginally at week ___. It will always be seen when the MSD is ___ mm.
week 5, 8mm
A missed abortion is defined as:
Retention of a dead conceptus for a prolonged period (e.g. 2 months)
The CRL measurement may be used through week ___.
12
The length of time calculated from the first day of the last normal menstrual period to the point at which the pregnancy is being assessed is ______ age and _____ age.
gestational and menstrual
The interface between the decidua capsularis and echogenic vascular endometrium is ______.
the double decidual sign
The first site of formation of RBCs that will nourish the embryo is the ____.
Primary yolk sac
The diameter of the yolk sac should never be more than ___ mm.
6 (5.6)
After fertilization, the corpus luteum produces
estrogen and progesterone
The zygote undergoes rapid cell division to form the 12-16 cell
morula
A pt is 10 weeks and presents with extremely elevated hCG levels and pregnancy induced HTN. You suspect:
hydatidiform mole
A heterotopic pregnancy is:
an ectopic pregnancy with a normal IUP
In a ruptured ectopic, which site is more life threatening?
a. interstitial
b. ampulla
c. fimbria
d. isthmus
a. interstitial
Theca lutein cysts, pregnancy induced HTN, hyperemesis, and large for gestational age are all associated with ____.
GTD
A molar pregnancy that is invasive but does not metastasize is called ___.
chorioadenoma destruens
hCG titers with an ectopic
will not double every two days, will be lower than normal then start dropping
hCG titers with GTD
abnormally high
What is the most accurate measurement to determine EDD?
CRL
A gestational sac in which the embryo fails to form is called ____ or _____.
blighted ovum, anembryonic pregnancy
Formed at 23 days when the primary yolk sac is pinched off by the extraembryonic coelom
secondary yolk sac
cellular, outermost embryonic membrane composed of trophoblast lined with mesoderm
chorion
The muscles most frequently mistaken for enlarged ovaries are
Piriformis
Where does fertilization usually occur?
ampulla
The floor of the pelvis is formed by the _____ muscles
Levator ani
Miss Greenfield is 73 years old and asymptomatic. She is NOT on hormone replacement therapy. Her endometrium should not measure more than
5mm
Which vessel provides the best landmark for localizing the ovary
internal iliac artery
Doppler waveforms of the uterine arterial flow typically show
high velocity, high resistance
Doppler waveforms of the ovarian arterial flow typically show
low velocity, low resistance
Which muscle groups form the lateral pelvic sidewalls
Obturator Internus
Anatomically, the uterus lies _______ to the urinary bladder and ________ to the rectum
posterior, anterior
T/F: The broad ligament is a true ligament?
false
A double fold of peritoneum that does not provide suspensory support to the uterus is _____
broad ligament
The potential space around the cervix is called the
fornix
The term used to describe the onset of the first menstrual cycle is
menarche
The endometrial echo would appear hypoechoic
during the periovulatory stage
Until ovulation, ovarian follicles grow at the daily rate of
2-3mm
The phase of the menstrual cycle following ovulation is referred to as the
secretory phase
Amenorrhea is
the absence of menses
Hematometracolpos
blood in the vagina and uterus
What is the most likely cause of Hematometracolpos?
imperforate hymen
The drug of choice most commonly used to induce ovulation is
clomid
What is GIFT
gamete intrafallopian transfer
A procedure involving the transfer of fertilized oocytes into the fallopian tube either laparoscopically or transcervically is
ZIFT
The endometrium of a patient receiving HRT would be considered abnormal if it measured more than
8mm
On color Doppler sonography, most malignant ovarian tumors yield flow signals that are best characterized as (high/low) impediance?
low
How does tamoxifen affect the uterus?
Causes a thickened, cystic appearing endometrium and increases the risk for endometrial carcinoma
A small amount of physiologic fluid may be seen in a postmenopausal endometrium. What is this usually due to?
endometrial atrophy
The most common gynecological malignant disease?
endometrial carcinoma
The functional layers of the endometrium are vascularized by the _______ arteries
spiral
In postmenopausal women, the ovaries measure approximately
2 x 1 x 0.5 cm
The abdominal circumference is measured at the level of
the stomach, left portal vein, and umbilical vein
The BPD is measured at the level of
thalamus and cavum septum pellucidum
Holoprosencephaly is associated with trisomy
13
The CI (cephalic index) is used to determine
head shape
The term double bubble denotes:
dilated duodenum next to stomach
T/F: The femur length includes only the femoral diaphysis
true
Clinodactyly
permanent curvature or overlapping digits
Measurement that includes both orbits at the same time
binocular distance
Findings of thickened nuchal fold, shortened femurs, and hypoplasia of the middle phalanx of the 5th digit are most likely associated with
Trisomy 21
Fetuses with Turner’s syndrome may also have an associated
cystic hygroma
an extra set of chromosomes
triploidy
A small rounded echogenic structure within the left ventricle of a fetal heart most likely is
papillary muscle
euploid
normal, balanced set of chromosomes
findings of epicanthal folds, cardiac defects, simian crease, protruding tongue
Trisomy 21
The absence of the cavum septum pellucidum and enlargement of the posterior horn of the lateral ventricle is called
tear drop sign/Dandy Walker’s malformation
nasal hypoplasia
nasal bone is not existent or measures less than 2.5 mm
A demonstration of the stomach, intestines, liver or heart in the thorax and associated with a mediastinal shift to the opposite side is called a
diaphragmatic hernia
normally situated umbilicus: omphalocele or gastroschesis
gastroschesis
Hyperechoic bowel should be compared to the echogenicity of ________ to be definitively diagnosed as “hyperechoic bowel”
the skeleton
Open neural tube defects are associated with elevated MS-AFP of ____________
> 2 MOM
____ should not be included in femur length measurement
distal femoral epiphysis
hypotelorism
eyes too close together
hypertelorism
eyes too far apart
which occurs with median cleft syndromes and frontal cephaloceles (hypertelorism/hypotelorism)
hypertelorism
IUGR is classified as weight below the ___ percentile
10th
teratogen
Any substance that causes abnormal structures in an embryo
thalidomide is an example of a
teratogen
Platycephaly
Flattening of the skull
“banana” sign
Refers to the shape of the cerebellum when a spinal defect is present
“lemon” sign
Occurs with spina bifida; frontal bones collapse inward
Microphthalmos
small eyes
The space of Retzius is also known as the
prevesical space
The follicles of the ovary are found in the
cortex
T/F: The posterior surface of the ovary is not covered by the broad ligament
true
Which of the following terms correctly describes the echogenic properties of the normal secretory endometrium in relation to the surrounding myometrium
hyperechoic
The primary function of LH is to
ensure the maturation of the Graafian follicle
In a uterus bicornis bicollis, there will be
1 uterine body with a septation, 2 cervices and 1 vagina
Which hormone supports and maintains the activity of the corpus luteum during the first trimester of pregnancy
progesterone
The four parts of the fallopian tubes are the following, in order from ovarian end to uterine end
infundibulum, ampulla, isthmus, intramural (interstitial)
What layer(s) of the endometrium are sloughed off during menstruation
decidual
Ovulaton occurs between the
follicular phase and proliferative phase
uterine response
menstrual, proliferative, secretory
ovarian response
follicular, ovulatory, luteal
menopause
termination of regular menses usually occurring at 45-55 years
menarche
onset of menses usually occurring at 11-14 years of age
premature menopause
before age 40
Many birth control pills work by blocking ______. This inhibits the release of an egg.
LH surge
the hormone that stimulates growth and development of ovarian follicles
FSH
the hormone that stimulates progesterone production and peaks after ovulation
it also makes the dominant follicle mature in order to rupture and release the egg
LH
Follicular response
days 1-14, follicles identified
when may a dominant follicle be seen by ultrasound, what might it measure
day 8, 10mm
Ovulatory response (ovulation)
day 14, dominant follicle ruptures 24-36 hrs after onset of LH surge
luteal response
15-28, ruptured Graafian follicle forms corpus luteum which produces progesterone, maintains the secretory endometrium
When does the corpus luteum regress if fertilization does not occur?
14 days
What would you not see after ovulation?
a. ) dominant follicle
b. ) corpus luteum cyst
c. ) ectopic pregnancy
a.) dominant follice
Menstrual phase
days 1-5, progesterone declines, endometrium sheds
what does the endometrium look like before and after the menstrual phase?
before: thick and echogenic, after: thin and slightly irregular measuring less than 2mm post menses
Proliferative phase
days 6-14, ovaries are releasing estrogen causing regrowth of the endometrium
How does the endometrium appear in the early and late proliforative phase?
early: hypoechoic area around prominent midline echo
late: thichkened, isoechoic endometrium
max ap 6-8mm
What is the bight echogenic middle line seen during the proliferative phase?
a reflection of the mucosal and basal layers are touching each other