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irregular period in ultrasound

ok so febuary 25 I had a ultrasound with doc that was 6w 3days(seen baby an heartbeat)
then at the hospital march 3 and they said I was 7weeks.(seen baby an heartbeat)
Im asking because I slept with a ex feb 10 and a bf all of January and first week of feb.
so being in mind my periods are irregular is it possible both ultrasound were off by 2weeks leading to my ex?
3 Responses
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603463 tn?1220626855
MEDICAL PROFESSIONAL
Hi!
If you were my patient, I would advise you that ultrasounds done in the first trimester (transvaginal ultrasounds) are accurate within 5-7 days.
SO, the ultrasounds could be off by as much as one week, but probably not by two.  If you were my patient, however, I would still recommend a DNA test as your dates are really too close for comfort.
Good luck!
Dr B
Helpful - 0
5272460 tn?1372384086
No. Ultrasounds are more accurate than dates. No way to know without a paternity test
Helpful - 0
Avatar universal
??
Helpful - 0

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