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14 Cards in this Set
- Front
- Back
the diameter of a yolk sac should never exceed
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5.6mm
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Implantation of the blastocyst into the endometrium occurs at
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7-9 days after ovulation
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In early pregnancy, the gestational sac grows at a rate of
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1.0mm/day
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a CRL measurement may be used up to the ___ week
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12th
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The embryonic heart begins to beat at
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35days
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The first site of formation of red blood cells that will nourish the embryo is the ________.
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primary yolk sac
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The beta hCG levels plateau and subsequently decline, whereas the gestational sac continues to grow after __________ weeks
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8
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The blastocyst typically enters the uterus
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4-5 days after ovulation
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For a menstrual age of 6 weeks what range should the hCG levels be at?
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61,080-56,500
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Give the sequestial appearance for the following (in menstrual weeks)
1. Spine 2. fingers 3. body movements 4. fetal heart 5. yolk sac 6. midgut herniation |
yolk sac (5 wks)
fetal heart (5.5-6) spine (7.5) body movements(9) midgut herniation (9.5) fingers(12) |
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With endovaginal ultrasound, an abnormal pregnancy is suspected when there is faliure to visualize the yolk sac with a minimum mean gestational sca diameter (MSD) of
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8mm
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In transabdominal scanning, a normal gestational sac can be conssitantly demonstrated when the beta hCG lelve is
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1800mIu/ml
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The fusion of the chorion and amnion occurs between ____________ weeks
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16-17
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In the first trimester, herniated bowel should return into the abdominal cavity by the _____ week.
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12
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