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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Absent Fetal Heart Beat On Scan During Pregnancy?

Hi according to my lmp i should be 6 weeks pregnant, i know what date i conceived it was the 9 June 2011, have done a home pregnancey test was positive instantly and have had a blood test also positive, went to the doctor this morning and he did a scan and told me i am only 4 weeks pregnant, we could see no heartbeat, but the sac and feotal pole was there, could the doctor have made a mistake in how far along i am
many thanks
shelly
Wed, 17 Jun 2015
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General & Family Physician,  's  Response
Hi,
I understand your concern.
Absence of heart beats in USG at 6 weeks of pregnancy indicates missed abortion.. that is arrest of fetal groth . Mostly it is due to hormonal deficiency, viral infection to mother ( Like toxo plasmosis, rubella, mumps), high grade fever.
In such case, always follow up scan is advised after 1 week to confirm lack of fetal heart beats. Taking a second opinion is also worth.
Thanks.
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What Causes Absent Fetal Heart Beat On Scan During Pregnancy?

Hi, I understand your concern. Absence of heart beats in USG at 6 weeks of pregnancy indicates missed abortion.. that is arrest of fetal groth . Mostly it is due to hormonal deficiency, viral infection to mother ( Like toxo plasmosis, rubella, mumps), high grade fever. In such case, always follow up scan is advised after 1 week to confirm lack of fetal heart beats. Taking a second opinion is also worth. Thanks.