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Is it more accurate if your doctor gave you a due date of February 18 and said you were 21 weeks pregnant but an ultrasound showed you were 20 weeks and had a due date of February 25?
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Answer

You may have had a longer cycle and become pregnant a little later than you thought. There is only a week between these 2 dates so it is not enough to worry about.

with my first pregnancy, my dates said I was due on September 23rd and my scan said October 4th. I knew I had intercourse on January second, so I guess it just took a while to implant.

I didn't get a positive pregnancy test until February 3rd, which would be about right.

Second time round my dates and scan were the same and I had a positive test on the day after my missed period.

The only time it really matters is if you had sex with 2 men a week apart and need a best guess as to which is the father.

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First answer by Englishangel. Last edit by Englishangel. Contributor trust: 1554 [recommend contributor]. Question popularity: 50 [recommend question]

Answers.com > Wiki Answers > Categories > Health > Sexual and Family Health > Pregnancy > Ultrasounds > Is it more accurate if your doctor gave you a due date of February 18 and said you were 21 weeks pregnant but an ultrasound showed you were 20 weeks and had a due date of February 25?

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