That's a good idea @scubagirl a roll call.
I'm not really sure on my date the ivf clinic gave me the 20/4 I worked out the 16/4. One baby was measuring 15/4 and the other was 18/4. I'm going with 16/4 but of cause they are twins and I will have to schedual in for a csection as also had previous csection so am hoping to make it 2/4! Have my OB appointment on the 24/9 so might get some more of an idea. My OB does scans at each appointment 😊