Pregnancy & Birth Clubs <
19/01/2018 at 18:36
Are ultrasounds dated from conception if unknown lmp?
19/01/2018 at 19:41
Ultrasound’s are dated based on how big the baby is :)
19/01/2018 at 22:03
Your due date is based on the first day of your last period.
Ultrasounds add 2 weeks onto your pregnancy as it is believed that most woman conceive around 2 weeks after the start of their period.
20/01/2018 at 09:30
But what about if i didnt know when my last period was would they still add the 2 weeks onto the scan?
20/01/2018 at 09:36
They will measure the baby from crown to rump and will give you a date based on that measurement :) so I thought I was due on the 14th July and I knew exactly when my last period was but they have dated me 11th July.
they only do it from the last day of your first period because it would be very difficult to know when you conceive as everyone is different and sperm can live for so many days :) if you are unsure of your dates let your Midwife know and she will send you for an early scan to get your due date :) when did you find out you’re pregnant?
20/01/2018 at 10:24
I have already had my 2 scans I am 38+2 today. So due any time but my ultrasound gave me a due date of 01/02/18 based on the size of the baby as I did not know lmp so would I find out the time of conception if I took 40 weeks off my due date?
20/01/2018 at 10:47
If you take 38 weeks off of your due date that would roughly be when you conceived but I don’t think it would be exactly :)
so before you have a scan they normally work it out from lmp so if you’re due on the 01.02.2018
if you knew your lmp would of roughly been the 27.04.2017 so therefore conception would of occurred around 2 weeks after that around the 11.05.2017 this is only roughly though and no one could guarantee an exact date as you could of ovulated a bit earlier or a bit later than this, if there is (& I’m just assuming here) a confusing about fathers the only way to determine this would be a dna test unless there was a Significant amount of time in between! I hope I’ve been some sort of help :) good luck for when baby arrives won’t be long now :)
20/01/2018 at 10:48
20/01/2018 at 11:15
That has really helped thank you so much, and yes that is the reason haha, thank you again x
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