Term
|
Definition
| When does the morula enter the uterus? |
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Term
|
Definition
| When does blastocyst implant into the endometrium? |
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|
Term
- outer cells - trophoblast, which forms the placenta
- inner cells - inner cell mass, which becomes the embryo
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|
Definition
| What are the two cell types in the blastocyst? |
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Term
|
Definition
| The trophoblast cells secrete what hormone? |
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|
Term
| From week 8 through end of week 12 |
|
Definition
When does the midgut herniate into
umbilical cord? |
|
|
Term
Embryologic age
The first day of the pregnancy being conception |
|
Definition
|
|
Term
Gestational age
Sonographers use this
The first day of the LMP being the beginning
of gestation |
|
Definition
|
|
Term
- Pregnancy test
- Ultrasound exam
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|
Definition
| Two most important diagnostic studies of an early pregnancy? |
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Term
|
Definition
| A hormone produced by the placenta and is highly specific for identifying pregnancy |
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Term
|
Definition
| How does gestational sac size and hCG levels relate until 8 week? |
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Term
|
Definition
| A normal gestational sac can be visualized transabdominaly with what hCG level? |
|
|
Term
|
Definition
| Transvaginally a normal gestational sac can be visualized whith a hCG leve of what? |
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|
Term
|
Definition
| The interface between the decidua capsularis and the endometrium forms what? |
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Term
|
Definition
|
|
Term
When MSD is 10mm and definetly
by 20mm |
|
Definition
| A yolk sac should be visualized with a MSD of what? |
|
|
Term
| When MSD is 18mm and definetly by 25mm |
|
Definition
An embryo should be visualized with a MSD
of what? |
|
|
Term
|
Definition
| What is the earliest anatomy seen and at how many week? |
|
|
Term
- nutrients
- development of blood cells (hematopoiesis)
- development of the endoderm that forms the promitive gut
|
|
Definition
| What does the yolk sac provide? |
|
|
Term
|
Definition
| The yolk sac is attached to the embryo by what? |
|
|
Term
|
Definition
When does the yolk sac absorb and no
longer seen?
|
|
|
Term
|
Definition
| When does the amnion and chorion fuse? |
|
|
Term
|
Definition
| Gestational sac is seen when? |
|
|
Term
|
Definition
| When is the embryonic heart motion seen? |
|
|
Term
|
Definition
| Where is the embryo located? |
|
|
Term
|
Definition
| The yolk sac is located inbetween where? |
|
|
Term
|
Definition
| a tubular extension of the endoderm of the yolk sac that extends with the allantoic vessels into the connecting stalk of the embryo. In human embryos, allantoic vessels become the umbilical vessels and the chorionic vill |
|
|
Term
|
Definition
| Normal bowell herniation, the bowel should be within the fetal abdomen by when? |
|
|
Term
|
Definition
| After rhombencephalon divdeds the cystic rhomboid fossa is imaged when? |
|
|
Term
|
Definition
| cystic structure seen in the head around 8 to 11 weeks? |
|
|
Term
|
Definition
| The embryonic heart starts beating when? |
|
|
Term
|
Definition
| when should the heart obtain its adult configuration? |
|
|
Term
|
Definition
| heart activity should always be seen by when? |
|
|
Term
| (Length + Width + Height)/3 =MSD |
|
Definition
| Mean Sac Diameter formula |
|
|
Term
| MSD + 30 =gest. age(days) /7 = gest. age(weeks) |
|
Definition
| Formula for finding gestational age |
|
|
Term
|
Definition
| Visualization of yolk sac predicts viable pregnancy in what precent? |
|
|
Term
|
Definition
| The yolk sacs normal diameter should never exceed? |
|
|
Term
|
Definition
the yolk sac should be visualized by what
MSD size? |
|
|
Term
| 12 wks, when fetus begins to curl |
|
Definition
|
|
Term
|
Definition
| How many CRL's should be averaged? |
|
|
Term
|
Definition
| Absence of embryo by 7-8 weeks |
|
|
Term
| CRL + 6 = gest. age (days) |
|
Definition
| gestational age formula with CRL |
|
|
Term
|
Definition
| Multiple gestations are how much of a higher mortality rate than singletons? |
|
|
Term
|
Definition
- 2 ova
- 70% of all twins
- Dichorionic/Diamniotic
|
|
|
Term
Monozygotic twins
Monochorionic-diamniotic |
|
Definition
- appear to be contained within one chorionic sac
- Two amnions, two yolk sacs, two embryos
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|
|
Term
Monozygotic twins
Monoamniotic-monochorionic |
|
Definition
- High mortality rate, approx. 50%
- one sac, one amniotic membrane, one or two yolk sacs, two embryos within one amniotic sac
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|
|
Term
|
Definition
| What hormones does the pituitary gland release? |
|
|
Term
| progesterone and a little estrogen |
|
Definition
| What does the corpus luteum secrete? |
|
|
Term
|
Definition
| The hypertrophic changes are referred to as what? |
|
|
Term
|
Definition
| At what week do the metanephros (kidneys) start ascendubg from the pelvis? |
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|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| How much does the sac increase per day? |
|
|
Term
|
Definition
| villi on the myometrial side |
|
|
Term
|
Definition
| villi covering the rest of the developing embryo |
|
|
Term
| Fundal and ipsilateral to ovulation side |
|
Definition
| normal implantation is where? |
|
|
Term
|
Definition
| amnion and chorion fuse when? |
|
|
Term
|
Definition
| Cerebral hemispheres should be able to be visualized by when? |
|
|
Term
| Near mothers, 75-80 beats per min |
|
Definition
| the heart begins beating at what rate? |
|
|
Term
|
Definition
| hCG levels plateau and subsequently decline when? |
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