12 week scan at 10 weeks

[Emmab321]

Hi guys,

I am looking for some advice.

I have a 12 week dating scan on Thursday . Based on LMP I would be 12 weeks but I am actually going to be 10 weeks based on my ovulation tracking ( I have very long cycles ) and confirmed by private scan last weekend.

I am glad for the opportunity to see baby again but I guess when they scan and realise I’m 10 weeks , they will ask me to go back in 2 weeks for another scan and the combined screening ?

Do you think I should contact the hospital to move the scan or will they want to do the scan on Thursday to check the dates for themselves ?

I am
Not sure what to do . I don’t want to waste an appointment.

They go off your last period not ovulation.
Do you mean your actually measuring 10 weeks and not 12?

Hi ,

Yes so the scan on Saturday measured at 9 weeks which does line up with what I expected based on ovulation / temp tracking .

Unless I’m missing something, your due date is based off LMP nothing to do with ovulation.
Keep the scan appointment if they think your measuring earlier they’ll sort.

Ah okay ! Thanks , I will just go to it and see what they say :)

When I went for my first scan (at what we thought was 12 weeks) I was only measuring 9+6 so they booked me in for 3 weeks later for the proper screening as baby was too small to get all the measurements etc.

Bonus you get to see baby twice in a short time!

This exact thing happened to me. They estimate off LMP but if your cycles are irregular that leads to them misestimating. They'll just get you to come back 2 weeks later.

Although it's called a "12 week scan" it can be done any time from 10 weeks to 14 weeks, so I wouldn't worry too much.

If you're earlier than this and they can't see much, they'll ask you to go back

This was exactly the same for me. I knew I’d measure behind and I did! So bad to go back a week later as baby has to measure at least 45mm and mine was smaller. Got to see baby twice in a week though!

@PinkCookie11

Unless I’m missing something, your due date is based off LMP nothing to do with ovulation. Keep the scan appointment if they think your measuring earlier they’ll sort.

Yes you are missing something in that some people's cycles aren't the "standard". So did giving birth 19months ago and still breastfeed I had two periods. One in December and one in Feb. I am not 9 weeks pregnant but if o listened to you, you'd think I'm 11. I'm not. I ovulated 4 weeks after my period and not two weeks. Op has said she knows when she ovulated and that is also a good marker (you just add two weeks onto that date)

@Horehound ffs 😂😂 take a chill

:)