Ultrasound showed 5 weeks 4 days but I’m supposed to be 6 weeks 1 day according to IVF

stardustchick

Hi all, I did IVF and went for my first scan at supposed 6 weeks 1 day based on transfer date.

Heartbeat was detected and my baby is measured 2mm in size, which turns out to be 5 weeks 4 days.

Is 2mm considered too small? And is it normal to be behind schedule considering it’s done via IVF?

If there is a heartbeat detected, does it mean I have nothing to worry about?