Question 1

how common is it to miss twins on a 7 week ultrasound?

Accepted Answer

Very common: Finding twins at this stage of pregnancy is dependent on finding two gestational sacs that are very small.

Question 2

at 4 weeks 4 days my hcg was 3, 900. 40 hours later it was 7, 261. my ultrasound isn't until tomorrow, i'll be 5w4d. is that high & could it be twins?

Accepted Answer

May be: There is considerable variability in HCG levels. Ultrasound exam would be better at detecting twins.See this site and discuss the matter with  your doctor.

http://www.americanpregnancy.org/duringpregnancy/hcglevels.html.

Question 3

can a twin be missed at 12 week ultrasound?

Accepted Answer

Yes: mistakes happen.  However, it is very unlikely.  If you are concerned, speak with your doctor.  A second ultrasound should confirm the initial findings.

Question 4

is it possible that the ultrasound technician could not see a triplet hiding behind twins at 11 weeks 3 days?

Accepted Answer

Yes: Depending on how thorough the study &amp; the training of the tech, missing a fetus is possible. Regular US is a 2 dimensional study and you only see what your probe lights up.

Question 5

at 12 weeks scan the ultrasound technician saw that the baby has penetrated the empty sac of the vanishing twin.how can this be?

Accepted Answer

Clarification: I would schedule a visit with your doctor to ask for clarification on the sonogram findings. This is such a specific question it requires someone to view the images of the sonogram to be able to interpret the results

Question 6

had ultrasound at 6. 2 weeks one had heartbeat 122. dr said was a twin other sac in ultrasound will i expel it empty sac or does it go away?

Accepted Answer

Go away: Usually when there are twin sacs and only one develops, the body may absorb it. Ocasionally the obstetrician will take care of the sac

Question 7

hi i had an ultrasound and baby measured 6 weeks 5 days and heartbeat was 152.one week later measured 8 weeks 4 days and heartbeat 171.. twins?

Accepted Answer

Unlikely: If you got an ultrasound they would have been able to see both fetuses if you were having twins.

Question 8

my 6 week ultrasound showed three white dots..does this mean twins or just a yoke sac and embryo?

Accepted Answer

3 dots on U/S: The results are not clear at all.  Repeat the U/S in 2 weeks.

Question 9

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

Accepted Answer

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.

Question 10

1st ultrasound, ~6 weeks 4days. two amniotic sacs but difficulty viewing 2nd. one heartbeat for sure. what are the chances of viable twins still & how good are the chances of at least one viable baby?

Accepted Answer

Two Sacs: Human twinning is very common.  In fact, ultrasound has shown that it is more common that previously thought.  Many times one of the fetus will fail to develop.  This should not affect the long term growth of the surviving twin.

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Doctor answers about:

7 week twin ultrasound

A member asked:

How common is it to miss twins on a 7 week ultrasound?

A member asked:

At 4 weeks 4 days my hcg was 3, 900. 40 hours later it was 7, 261. my ultrasound isn't until tomorrow, i'll be 5w4d. is that high & could it be twins?

A member asked:

Can a twin be missed at 12 week ultrasound?

A member asked:

Is it possible that the ultrasound technician could not see a triplet hiding behind twins at 11 weeks 3 days?

A member asked:

At 12 weeks scan the ultrasound technician saw that the baby has penetrated the empty sac of the vanishing twin.how can this be?

A member asked:

Had ultrasound at 6. 2 weeks one had heartbeat 122. dr said was a twin other sac in ultrasound will i expel it empty sac or does it go away?

A member asked:

Hi i had an ultrasound and baby measured 6 weeks 5 days and heartbeat was 152.one week later measured 8 weeks 4 days and heartbeat 171.. twins?

A member asked:

My 6 week ultrasound showed three white dots..does this mean twins or just a yoke sac and embryo?

A member asked:

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

A member asked:

1st ultrasound, ~6 weeks 4days. two amniotic sacs but difficulty viewing 2nd. one heartbeat for sure. what are the chances of viable twins still & how good are the chances of at least one viable baby?

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