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14 Cards in this Set

  • Front
  • Back
the diameter of a yolk sac should never exceed
5.6mm
Implantation of the blastocyst into the endometrium occurs at
7-9 days after ovulation
In early pregnancy, the gestational sac grows at a rate of
1.0mm/day
a CRL measurement may be used up to the ___ week
12th
The embryonic heart begins to beat at
35days
The first site of formation of red blood cells that will nourish the embryo is the ________.
primary yolk sac
The beta hCG levels plateau and subsequently decline, whereas the gestational sac continues to grow after __________ weeks
8
The blastocyst typically enters the uterus
4-5 days after ovulation
For a menstrual age of 6 weeks what range should the hCG levels be at?
61,080-56,500
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)
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
8mm
In transabdominal scanning, a normal gestational sac can be conssitantly demonstrated when the beta hCG lelve is
1800mIu/ml
The fusion of the chorion and amnion occurs between ____________ weeks
16-17
In the first trimester, herniated bowel should return into the abdominal cavity by the _____ week.
12