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When's the best time to get pregnant? Use our interactive ovulation calculator to work out when you're most fertile and most likely to conceive.

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When's the best time to get pregnant? Use our interactive ovulation calculator to work out when you're most fertile and most likely to conceive.

Conception

how accurate in dating pregnancies are scans done at 8 weeks?

27 replies

sparklingreactions · 22/12/2008 19:49

how accurate in dating pregnancies are scans done at 8 weeks? could a scan at 8 weeks possibly have been an 11 week fetus and be out by 3-4 weeks. i had 3 scans and they all tied in to 4 days of eachother.

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oonaok · 20/05/2015 17:41

Heya I think they can be out a bit.. I took my pos tests 10weeks ago and was told at scan I'm 8.5weeks along so have to reschedule the dates to a month away as for accuracy it's too early! But same thing with first baby.. Dates meant I also wasn't pregnant when I took tests which obv. I was and am!

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oonaok · 20/05/2015 17:50

No it doesn't.. Fetilisation and implantation take a lil time and sperm surivives about 5days. But I've a friend who hadn't seen her bf for 3weeks around estimated conception! And their child is most definitely his