Hey there,

Does anyone know which scans are more accurate.

I had a very irregular cycles, no period for 4 months, then one in 2 months, so I had no idea on dates.

My first scan was done at 4w5d then another at 5w6d (first ectopic check, second viability), then another at what I thought was 9w3d but it showed me at 9w6d.

Because I'm trying to get the timing right to get an NT scan, does anyone know if the earlier or the later scan would be more accurate for dates? The very first only saw a sac and measured that, the second saw a tiny seed with a HB and measured the seed, the third measured a very obvious baby.

Just unsure...according to the last scan I've booked my NT scan for 12w3d, but I'm concerned that if the earlier scan was more accurate that I'll be only just on 12w for it...maybe too soon.