Doctor insights on:
How Accurate Are Dating Scans
How accurate is a dating scan saying im 9 weeks. Had 2 a week and a half apart and both said same things. 1st-due date jan 27th other, jan 26th 2016.
Ultrasound: dating is generally accurate by +/- 8% in days, so at 9 weeks it is accurate to approximately +/- 5 days. ...Read more
Very: It has a 5-7 day margin of error. It is quite accurate. ...Read more
How accurate are early dating scans mine came back 6weeks 5days due 23 October and my LMP was on 13/1/14 due date 20th October ?
Conception: Early scans are the most accurate and most used way to determine conception and due dates. You can verify all you need to know about your pregnancy yourself on the internet. The tools are readily available. Your baby was conceived on 1/30/2014 from sex that occurred 1/25/2014 to 1/30/2014. You can verify this here: http://www.babymed.com/conception-calculator. ...Read more
OK: Dating via ultrasound decreases in accuracy with increasing fetal age. ...Read more
Should be ok: Dating ultrasound scans have good accuracy at 8-11 weeks, so one done at 13 weeks should still be reliable. Dates by ultrasound are always estimates. ...Read more
How accurate is 12 week dating scan? Babies crl measured 5.6cm, the doctor said this makes me 12w 1 d pregnant? Do this sound right?
Sounds right : That sounds right. 12 week sonograms have about a 5 day margin of error. ...Read more
Why did my 9 week scan change my lmp date? Did i ovulate late. Is that what happend? Is dating scan at 9 weeks accurate to find ovulation?
Scan likely accurate: A 9 week scan should be accurate at getting our best idea of a due date, although it is within normal range to deliver anytime between 37 and 41 weeks....so even our best guess isn't that "accurate". And yes, if the scan made your due date later, then you likely ovulated later. Ovulation time can vary even with fairly regular periods. ...Read more
Does my due date from dating scan at 9 weeks give an accurate day of when i ovulated. My lmp was 7 days earlier than dating scan said it was.
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