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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Absence Of Gestational Sac With No Cardiac Activity?

Am in 8 week 1st baby pregnant I took us obstetric transsvaginal scan two times 1scan. 7week its shows 6week us age no cardiac activity, no free fluid ges sac yolk sac fetal pole seen,both ovaries are normal and in 2nd scan.7 week 5 day that time scan shows same 6week age yolk sac(9mm)is large in diameter crl(3.2mm) cervical length 3cm ovaries are normal mild free fluidanf feeble carfiac activity noted. Doctor ask me to again for 9th week for scan to decide final whether is normal pregnancy or missed miscarriage. My question also same
Wed, 17 May 2017
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General & Family Physician,  's  Response
Hi,
I have read your answer and would like to answer.
Once pregnancy test comes positive gestational sac can be seen as early as at 4 weeks on transvaginal ultrasound, and 5 to 8 weeks on abdominal ultrasound. Ultrasound also can measure 1 or 2 weeks plus or minus gestational age(pregnancy age) means it can tell 1 week more or less gestational age,as it calculates pregnancy date not from the last day of menstrual period but from the day when fertilization was happened.
you had a ultrasound at 7 weeks, and on ultrasound the fetal pole was not seen, age was 6 weeks,there could be two reasons not seeing the gestational sac, one gestational age would not be exact 6 weeks, second fetal pole was not developed yet, and after 5 days ultrasound was repeated and it showed fetal pole(fetus) with feeble cardiac activity that means its not missed miscarriage as cardiac activity was seen.
It might go on to be normal healthy pregnancy or missed abortion as cardiac activity was feeble. Nothing can be said right now, you have to wait and have repeat ultrasound. keep following up with your doctor.
Hope this answer is helpful.
Thanks
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What Causes Absence Of Gestational Sac With No Cardiac Activity?

Hi, I have read your answer and would like to answer. Once pregnancy test comes positive gestational sac can be seen as early as at 4 weeks on transvaginal ultrasound, and 5 to 8 weeks on abdominal ultrasound. Ultrasound also can measure 1 or 2 weeks plus or minus gestational age(pregnancy age) means it can tell 1 week more or less gestational age,as it calculates pregnancy date not from the last day of menstrual period but from the day when fertilization was happened. you had a ultrasound at 7 weeks, and on ultrasound the fetal pole was not seen, age was 6 weeks,there could be two reasons not seeing the gestational sac, one gestational age would not be exact 6 weeks, second fetal pole was not developed yet, and after 5 days ultrasound was repeated and it showed fetal pole(fetus) with feeble cardiac activity that means its not missed miscarriage as cardiac activity was seen. It might go on to be normal healthy pregnancy or missed abortion as cardiac activity was feeble. Nothing can be said right now, you have to wait and have repeat ultrasound. keep following up with your doctor. Hope this answer is helpful. Thanks