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Dr. Andrew Rynne
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Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Does Ultrasound Scan Finding Gestational Sac Not Well Defined Indicate?

My last period was 3rd of may, though my period was irregular before then, but my Dr. was tracking my ovulation as I was desiring to concieve, eventually i missed my period in June, i went for both urine and blood test and they came out positive, I have no symptoms of pregnancy yet except for sore breast which comes and goes and diahorea, i went for utrasound last week and my Dr. said that the gestation sac wasnt well defined, that i should come back this week, i am a liitle bit worrid cause i dont understand what he really meant
posted on Thu, 13 Mar 2014
Twitter Fri, 22 Jan 2016 Answered on
Twitter Mon, 25 Jan 2016 Last reviewed on
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OBGYN,  's  Response
Hallow Dear,

When pregnancy test is positive but still the ultrasonography report comes as 'Gestational sac not well defined', there is a possibility of absent embryo in the sac. This is called as Blighted ovum. You may repeat the scan again after about a week or so. If empty gestational sac is seen, the diagnosis is confirmed.

In Blighted ovum, the pregnancies do not continue and grow. If it does not get aborted spontaneously, you may have to get it terminated by medicines. Your Obstetrician will take the decision after repeat scan.

I hope this helps you.

Dr. Nishikant Shrotri
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What Does Ultrasound Scan Finding Gestational Sac Not Well Defined Indicate?

Hallow Dear, When pregnancy test is positive but still the ultrasonography report comes as Gestational sac not well defined , there is a possibility of absent embryo in the sac. This is called as Blighted ovum. You may repeat the scan again after about a week or so. If empty gestational sac is seen, the diagnosis is confirmed. In Blighted ovum, the pregnancies do not continue and grow. If it does not get aborted spontaneously, you may have to get it terminated by medicines. Your Obstetrician will take the decision after repeat scan. I hope this helps you. Dr. Nishikant Shrotri