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Doctor insights on: Ultrasound Shows Single Fetus Previously Showed Twins

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At 12 weeks the ultrasound technician saw that my fetus has penetrated the empty sac of the vanishing twin.how could this be?

At 12 weeks the ultrasound technician saw that my fetus has penetrated the empty sac of the vanishing twin.how could this be?

Good question: I am not sure what the ultrasound technician may have meant if he/she really stated the surviving fetus has penetrated the empty sac of the vanishing twin. If he/she is implying that the membranes of the vanishing twin are somehow wrapping around the surviving fetus, then this is a situation that you would want to have clarified by a Maternal Fetal Medicine specialist. Discuss a referral. ...Read more

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Dr. Michael Gabor
2,190 doctors shared insights

Sonogram (Definition)

An ultraound, also known as a sonogram, is a painless and relatively inexpensive imaging test that utilizes sound waves instead of ionizing radiation. There are no side effects. Ultrasound can give us two-dimensional, and in some applications three-dimensional, images of structures and organs in virtually any part of the body. In addition to diagnostic uses, such as evaluating abnormalities in the abdomen, pelvis, and breast, ultrasounds are commonly used to guide needle and catheter placement in a variety of surgical ...Read more


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Just had an ultrasound at 6wks/2dys twin sacs very close together. I've a very tilted uterus. A yolk sac was seen in one but no fetal pole/hb. Viable?

Just had an ultrasound at 6wks/2dys twin sacs very close together. I've a very tilted uterus. A yolk sac was seen in one but no fetal pole/hb. Viable?

Twin sacs: You will need to have a few more scans over the coming weeks. It is possible that it was too early to see the fetus/heartbeat of both or either twin. Further scans will help see whether it is a miscarriage or not. It is not uncommon to see twin sacs early, but only one living baby later on. One twin can not develop ( it dies and is resorbed ) while the second twin does well with no problem at all. ...Read more

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Ultrasound at 7wks 6day shows very small gest.Sac but fetus w/ a good hb measuring 7wk2d. Sac is cloudy. Was told i will miscarry soon. Is there hope?

Ultrasound at 7wks 6day shows very small gest.Sac but fetus w/ a good hb measuring 7wk2d. Sac is cloudy. Was told i will miscarry soon. Is there hope?

There's always a: Chance. 12 weeks seems to be a 'magic' crucial stage. Miscarriages are more common before 12 weeks and less common after. Ultrasound is not perfect, and sometimes the cloudy sac is a technical issue with the ultrasound. No test and no doctor can predict the future with 100% accuracy. Sometimes the best advice is to to prepare for the worse, and hope for the best. ...Read more

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Can a fetus that shows at the ultrasound 8 weeks can actually be 14 weeks and the ultrasound to show more?

Can a fetus that shows at the ultrasound 8 weeks can actually be 14 weeks and the ultrasound to show more?

Don't completely: understand the question, but a normal 14 week fetus could never be mistaken for an 8 week gestation. ...Read more

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GA is 8 weeks 4days when ultrasound was done. Ultrasound shows GA as 7 weeks 6 days. Fetus is 1.47cm. FHR 158bpm. Is this normal range? I'm 40.

GA is
 8 weeks 4days when ultrasound was done. Ultrasound shows GA as 7 weeks 6 days.  Fetus is 1.47cm. FHR 158bpm. Is this normal range? I'm 40.

Within normal range: At this point in pregnancy, a 4 to 5 day difference between the dating of your pregnancy by your last normal menstrual period and the dating by sonographic findings is usually within acceptable limits and subject to confirmation by another ultrasound 4 to 5 wks later. The 1.47 cm measurement of embryo can be considered" fairly reliable and accurate" if obtained by a skilled, certified sonographer ...Read more

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32 week ultrasound shows fetus' bilateral ventricles are 9.5 mm. Doc wants me back after 2 weeks for another. Can this be a bad problem?

32 week ultrasound shows fetus' bilateral ventricles are 9.5 mm. Doc wants me back after 2 weeks for another. Can this be a bad problem?

Hc monitoring: I assume it is ventriculer index you are talking about at 32 weeks midline zone is9-10 mm I am sure your physician has been monitering the ventrical size in your baby if it is less or more than the 2 standered deviation of your babies prior ventriculer size it needs to be closely monitered ...Read more

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Sex on dec 31,end of March and beginning of April.On May 28 ultrasound show a 8 week fetus, the sex from December has something to do with it ?

Pregnancy: Hi, what different it makes? You are pregnant now and you should enjoy it unless you had multiple partners and the only way to knew the father is to do paternity test. Good luck ...Read more

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Can ultrasound show that fetus died because of maternal thrombophilia?

Can ultrasound show that fetus died because of maternal thrombophilia?

Sorta: HYDROPS fetalis is pretty obvious. But the blood and pathology reports are definitive. http://www.nlm.nih.gov/medlineplus/ency/article/007308.htm ...Read more

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Are the measurements that precise on ultrasounds that it can show the difference between a 12wk fetus and a fetus that is 12wks and 4 days?

Are the measurements that precise on ultrasounds that it can show the difference between a 12wk fetus and a  fetus that is  12wks and  4  days?

NO: There are minor variations in how the measurements are made and differences in the size of different fetuses. These variations can easily account for a four day discrepancy. ...Read more

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