At my first scan I was supposed to be 6 weeks exactly but the sonographer said it looked like I was only 4.5/5 weeks (could see a sac and yolk sac, that's it). I went back in two weeks and measured 8 weeks (my original dates!) so I don't know how that worked!
6 weeks i was told. i tried to make an appointment the day i found out, but was told dating ones can only be done at 6+ weeks as thats when they can pick up the heartbeat guess it all depends on were you go. that was just the regular outside (external?) scan.
I had one at 4.5weeks and 5.5weeks and there was no difference between the two except the sonographer said she might have saw the glimpse of a yolk sac at the 5.5week one. My Ob then did one at 6weeks exactly and he could see the HB and fetal pole and printed me a picture of although it really didn't show anything except the gestational sac. Bub was so tiny I couldn't see the HB although my Ob assured me it was there.
The earliest I have seen the heartbeat was 6w6d.
I was always told to make the first appointment around 7 weeks as they can't guarantee anything before that.
Good luck today I hope it all goes wonderfully.
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