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Yolk Sac sizeFrom: Bill King (billking@cros.net)Tue Jan 19 18:29:59 1999
I personally have not seen a pregnancy in which the yolk sac was 7 mm. or larger before 8 weeks gestation that has progressed past the first trimester. I have been measuring yolk sac size for about 4 years. We usually tell the patient that we would like to re-scan them in 2 weeks. We hint that sometimes it is a sign that things are not quite right. We caution that we are just going to take another look in two weeks to be on the safe side to see if things are progressing normally.This seems to help prepare the patient. Have the Chromosome abnormalities that you have found been confirmed only by testing the abortive fetus, or have you seen these pregnancies progress? We do not do 1st trimester scans on all patients. Maybe if we did, I would see this more frequently. Also, I have seen the yolk sac when it has a crumpled, or calcified appearance. Would anyone care to discuss this? These pregnancies don't seem to do very well either. Ruth A. King RT, RDMS
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