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35 Cards in this Set
- Front
- Back
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Decidua Basalis
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thickened decidual zone of reaction at the implantation site
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Decidua Capsularis
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Thin decidua that has grown to overly the implanted gestational sac
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Decidua Parietalis
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The remaining endometrium that was not at the site of implantation
"decidua vera" |
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Chorion
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embryonic tissue lining the outside of the gestational sac
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Chorion Frondosum
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Chorion facing the endometrium at the implantation site
Forms the chorionic villi |
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Chorionic Laeve
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The thin chorion of the gestational sac facing the endometrial cavity
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FSH increased
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Produced from the anterior pituitary lobe
Day 1 |
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Estrogen increased
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produced by the ovaries
increases days 2-14 continues through day 21 |
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LH
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Produced from the anterior pituitary lobe
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Progesterone increased
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Causes corpus luteum to form
days 14-21 |
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Changing hormones alter the:
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hormone levels
Changes in the uterus Changes in the follicles |
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Fertilization occurs in the:
The fertilized ovum becomes the: |
distal 1/3 of fallopian tube
zygote (two cells are one, then divide by 2) |
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Cell division becomes the:
It is the: |
morula
cluster of cells 16-32 |
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At about day 20, the morula becomes the:
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blastocyt
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Occurs between days 20-23:
It usually occurs at: |
fertilization
A level of the uterus that supports placentation |
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Syncytiotrophoblasts are:
Usually occurs during week: |
the trophoblast cells of the blastocyt that contact the uterine endometrium
Week 4 |
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Placentation is when:
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development of the uteroplacental circulation occurs
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During week 4, and inncer cell mass becomes an:
This seperates the: |
embryonic disc
embryonic cavity from the primary yolk sac |
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The double sac sign is:
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two echogenic incomplete coecentric rings seperated by a hypoechoic zone
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Layers of the double sac sign:
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Inner ring (decidua capilaris and choriion laeve)
Outter ring (decidua pariettalis) Darker zone: endometrial cavity and fluid |
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Visible at 6 weeks:
When can you tell the head from the rump? |
embryo
7-9 weeks |
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First trimester pregnancy measurements:
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GS, YS, CRL, biperietal diameter, femur length, abdominal circumference
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Average Sac Diameter is measured: (when)
Used to: |
Before the embryo is visible
Date the gestation and determine amnionic fluid volume |
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How to measure the ASD
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Measure the inside borders of the GS in 3 months, sum and divide by three
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Yolk sac becomes visible:
Serves as a: Diameter: |
between weeks 5-6
locator of the fetal pole 5-6 diameter at this point |
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Crown rump length is the distance between:
Accurate w/in: |
the arms extended upward and palms facing up
Accurate w/in 4 days of GA |
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Neuroplate timing:
Neurotube and neurocrest: Brain segmentation timing: |
menstrual week 4-5
Brain and spinal cord from the neurotube At week 6 |
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Forebrain
Midbrain Hindbrain |
1) cerebrum, lateral ventricles, thalamus
2) aqueduct of Sylvius 3) pons, medulla, cerebellum, 4th ventricle |
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The fetal neurotube is formed by the:
It closes from the: |
fetal spine and spinal cord
Middle toward both ends |
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The brain, or an anechoic fluid filled mass, develops in week:
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10
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The heart is the fusion of:
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two parallel cardiac tubes, which eventually fold to make 4 chambers
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Pregnancy is confirmed at the observation of:
Seen at: |
the hearts tubular activity
5 weeks transvag 7 weeks transab |
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Lungs buds form week:
At the: |
5
most proximal part of alimentary canal |
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Small bowel herniates into the umbilical cord:
Swallowing: Kidney: Urine: |
10-11 weeks
12th 10th 2nd trimester |
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Bones can only be seen when this is present:
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mineralization
Begins at 8 weeks |
