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Doctor insights on: 7 Week Embryo Ultrasound

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Can an ultrasound have conclusive findings about the embryo at 6 weeks? Is it possible to tell an embryo is abnormal so early?

Can an ultrasound have conclusive findings about the embryo at 6 weeks? Is it possible to tell an embryo is abnormal so early?

Sometimes, depends: If dates are very reliably know, US at 6 weeks can sometimes confirm that a pregnancy is abnormal. If dates are not certain the ultrasound becomes less conclusive. US can never guarantee 100% that a pregnancy at any stage is 100% normal. ...Read more

Dr. Michael Gabor
2,275 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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First ultrasound last 09/22/2014 there were two embryos. One 6 weeks and 5 days, other 6 weeks and 3 days. However, no heartbeat was found.?

Need follow up: You will need a follow up ultrasound in 1 -2 weeks to evaluate the status of the findings. Sometimes the embryo is too small to clearly show a heartbeat prior to 6 weeks. Your doctor will likely correlate this with your lab results. ...Read more

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I just had first ultrasound. Measuring 6 weeks and 6 days. There was no embryo, just sac and placenta. Dr said sac was. 19 cm. What is that in mm?

I just had first ultrasound. Measuring 6 weeks and 6 days. There was no embryo, just sac and placenta. Dr said sac was. 19 cm. What is that in mm?

19 mm: You can only give days and weeks when measuring the embryo. If this is the fetal sac it's very early and a repeat should be done in a week. ...Read more

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I had an early ultrasound at 5.5 weeks. A yolk sac was detected but not an embryo yet. What are the chances as embryo will develop?

I had an early ultrasound at 5.5 weeks. A yolk sac was detected but not an embryo yet. What are the chances as embryo will develop?

Very High: I would not be discouraged. That is still very early. The pregnancy changes a lot early in pregnancy. If you repeat next week hopefully you will see the pregnancy itself and the heart beat. A couple days can make a high different between 5 and 6 weeks! ...Read more

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Had ultrasound today after a frozen embryo transfer 3 weeks agoand showed nothing. My beta doubled in 48 hours. Should I be hopeful?

Had ultrasound today after a frozen embryo transfer 3 weeks agoand showed nothing. My beta doubled in 48 hours. Should I be hopeful?

Yes: Ultrasound like all tests has a certain resolution so it pick up structures of a certain size but if the probe wasn't aimed at exactly the right place it would not detect the very small embryo. The chemical test on the other hand is looking for a functioning ball of tissue which is increasing in size which is what you reported. Now I wouldn't go out and drink a cuvée of bubbly yet but... ...Read more

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Ultrasound report said 6 weeks, 122 BPM but abnormal embryo. I conceived naturally why would the report say abnormal embryo and is this accurate?

Ultrasound report said 6 weeks, 122 BPM but abnormal embryo. I conceived naturally why would the report say abnormal embryo and is this accurate?

Abnormal US: At six weeks, it is very difficult to see much to determine if the embryo is normal or not. While they reported a good heart beat, there is not much more that you would see. I wonder if they are referring to bleeding around the placenta. I hope they scheduled a repeat ultrasound in 7-10 days to offer you more information. ...Read more

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I had an ultrasound and I am 6 weeks. They said I implanted low but the heartbeat was 122bpm. They also said that it was an abnormal embryo. What is it?

I had an ultrasound and I am 6 weeks. They said I implanted low but the heartbeat was 122bpm. They also said that it was an abnormal embryo. What is it?

Not Sure: To me, an abnormal embryos means it was genetically tested with PGD and found to have the wrong number of chromosomes. But one should not use that embryo. So maybe they mean the embryos appeared to be a lower quality embryos. You may want to ask them to clarify things. Your next ultrasound will provide more answers ...Read more

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Embryo was measuring on target on ultrasound performed at 6 weeks 3 days. Now 8 days later, embryo measures 7 weeks 2 days (rather than 7 weeks 4 days) hearbeat present on both scans. Have had a previous miscarriage and two healthy births, am very worri

Embryo was measuring on target on ultrasound performed at 6 weeks 3 days. Now 8 days later, embryo measures 7 weeks 2 days (rather than 7 weeks 4 days) hearbeat present on both scans. Have had a previous miscarriage and two healthy births, am very worri

No need to worry: The early ultrasound exam of the embryo although fairly accurate still can measure plus or minus a few days. These measurements are small and by just placing the caliber a few tenth of a millimeter more or less will give one more or less day. The simple rule is first trimester scans can be are plus or minus 1 week off, second trimester plus or minus 2 weeks and third plus or minus 3 weeks. ...Read more

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Vaginal ultrasound did not detect heartbeat at 6 weeks 4 days. Seen the sac and embryo. Risk of miscarriage?

Vaginal ultrasound did not detect heartbeat at 6 weeks 4 days. Seen the sac and embryo. Risk of miscarriage?

50/50: At this point I would say your chances are about 50/50. A vaginal sonogram at 6 weeks and 4 days can usually see a heartbeat; but if your dates are off a little, it could be too early. As long as you aren't having a lot of pain or heavy bleeding, waiting a week and rechecking the sonogram is probably best. ...Read more

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Can you see anything on vaginal ultrasound at 5weeks gestation? Possible to miss a embryo at 5 week gestation?

Can you see anything on vaginal ultrasound at 5weeks gestation? Possible to miss a embryo at 5 week gestation?

Too early: You can see a lot at 5 weeks EGA: you can definitely see a gestational sac and you would likely see a yolk sac. It would be incredibly rare to see a fetal pole (baby) at 5 weeks, so 99% you would definitely miss an embryo at 5 weeks. I'm curious: are you actually 46 years old? ...Read more

Dr. Paul Velt Dr. Velt
2 doctors agreed:
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Ultrasound showed g-sac&no embryo/beartbeat Doctor said I was 6 weeks along& hcg levels r 1600. Is it normal not 2 see embryo or yolk sac this early?

Dr. Paul Velt Dr. Velt
2 doctors agreed:
Ultrasound showed g-sac&no embryo/beartbeat Doctor said I was 6 weeks along& hcg levels r 1600. Is it normal not 2 see embryo or yolk sac this early?

HCG sounds low: And at 6 weeks there should be more to see such as heart beat and yolk sac. One thing to keep in mind is that dates could be off. It is best to wait about 2 weeks and repeat the blood work and sonogram and then you will have a better idea what is happening ...Read more

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Ultrasound showed g-sac no embryo/heartbeat Doctor said I was 6 weeks 0 days&hcg levels r 1600. Is it normal not 2 see embryo or yolk sac this early?

Ultrasound showed g-sac no embryo/heartbeat Doctor said I was 6 weeks 0 days&hcg levels r 1600. Is it normal not 2 see embryo or yolk sac this early?

No, but possible: HCG levels have helped over the years to distinguish between normal and abnormal pregnancies. A transvaginal ultrasound performed on a patient who has an hcg level between 1500-2000mIu will probably see a normal pregnancy. However, there are exceptions (i.e.twin pregnancies, ectopic pregnancies, heterotropic pregnancies) which can confuse the picture. Repeat ultrasound in one week may clear this up ...Read more

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I WENT FOR A ULTRASOUND IT SAID I WAS 5WEEKS AND 6 DAYS BUT NO EMBRYO IN THE SAC IS THIS NORMAL?

I WENT FOR A ULTRASOUND IT SAID I WAS 5WEEKS AND 6 DAYS BUT NO EMBRYO IN THE SAC IS THIS NORMAL?

Yes: This is normal at this stage. The embryo should become visible within a week or so. ...Read more

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I had an ultrasound done I'm 5weeks3 days and they said they only saw asac no embryo what does this mean Will the embryo start togrow soon I'm worried?

I had an ultrasound done I'm 5weeks3 days and they said they only saw asac no embryo what does this mean Will the embryo start togrow soon I'm worried?

Just repeat the scan: Once your betaHCG level passes 1000 to 1500 mIU/ml, a small seemingly empty gestational sac is the first transvaginal-sonographic finding of a very early pregnancy. The presence of a secondary yolk sac then of a small embryo will soon follow and can be correlated to the levels of betaHCG and to the overall dimensions of the gestational sac. A well timed repeat sonogram will answer your question. ...Read more

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When does the embryo start to show up on an vaginal ultrasound before a woman should start to worry?

6-8 weeks: Other signs of a pregnancy (gestational sac then yolk sac) can be seen slightly earlier, but seeing a fetal pole, yolk sac and sometimes cardiac fluttering confirms a viable pregnancy. ...Read more

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My1st ultrasound (transviginal) there was an embryo, sac lowly implanted no heartbeat, my second tvu there's no embryo, but highly implanted. Possible?

My1st ultrasound (transviginal) there was an embryo, sac lowly implanted no heartbeat, my second tvu there's no embryo, but highly implanted. Possible?

Unclear words: It is unclear what you mean by the term "highly implanted." that is not a term I am familiar with. If you had a sonogram and a fetus was seen with a heart beat then you are good. If only a sac was seen then it depends on if you are far enough along to see a baby or not before any conclusion can be made. ...Read more

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Ultrasound measured 5w3d based on CR length. Sack, yolk and pole visible. HCG not doubling. Could hcg still rise even if embryo not developing?

HCG can still rise: Most betaHCG is produced by trophoblastic cells of the placenta and the level of betaHCG reflects the activity of this placental tissue; unfortunately it can continue to rise even if there is no embryo or if the embryo is not developing". ...Read more

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7 wks ago IVF/ET. 2 embryos. Betas 164, 112 127 then 99. 5 wks post-ET betas 479, today 753. Ultrasound 4.5mm IU sac. Ectopic? Incomplete miscarriage?

Need another value: Did they check your progesterone lately? Not necessarily an ectopic. And you would need another beta repeat in 48 hrs from the 753 to be able to know more re: type of pregnancy. ...Read more

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Ultrasound shows gestational age 6w4days. Yolk sac present only. Should there be an embryo? Heartbeat?

7 weeks: I usually tell my patients that they should see cardiac activity at 7 weeks. The fetal pole is evident before that. You may want to do beta HCG levels 48 hours apart the change in these values can help answer some of your questions. ...Read more

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I had an ultrasound while I was 7weeks 4 days but the embryo was only 5weeks 5 days, why they could see the gestational sac and yolk sac but no embryo?

Please clarify: Your question says 5w5d embryo and then asks why embryo not seen? Not clear what your question is unless timing--early u/s are examining something about the size of an almond, so there is the potential for much variability on dating at first--gets much more accurate as pregnancy grows. ...Read more

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Abdominal ultrasound at 7w3d showed empty sac. Hcg rising normally, is there any chance that the embryo was "hiding"?

Sounds odd: Usually by 7 weeks you should see something but is it a 7 weeks sized sac or is that based on your lmp. If its a smaller sac, maybe your dates are off a bit and then there's a chance. Next would want to make sure that the sac definitely satisfies criteria for an intrauterine pregnancy or else an ectopic pregnancy needs to be at least thought about. ...Read more

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I had an ultrasound today and was told that the embryo had implanted lower in the womb (middle). What are my chances of carrying to full term?

I had an ultrasound today and was told that the embryo had implanted lower in the womb (middle). What are my chances of carrying to full term?

Should be fine: Your chances of carrying to term should not be any different. The places where implantation of the embryo can be a problem include the cervix, junction of the fallopian tube and uterus, cesarian scar, and outside the uterus in the fallopian tube. Followup ultrasound can always be performed if there is a question. ...Read more

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I went and had transvaginal ultrasound 1 day before 6 wks. Saw sac but no fetal pole or embryo. Said there is debris and they think i'll miscarry.

Only time will tell: Unfortunately, there is nothing anyone can do at this early state. Lack of a fetal pole at 6 weeks is not a good sign. Serial measurements of the pregnancy hormone HCG may be useful to confirm unless "menses" starts, which would also verify miscarriage. ...Read more

Embryo (Definition)

An embryo is a developing human being from between 1- ...Read more