I used my O date because I O late (around day 18-21) so LMP would skew everything (early ultrasound confirmed my dates). Anyway, for DD#1 it was 39w6d and 39w3d with DD#2, both spontaneous labors.
#1-39w 4d...wasn't charting yet, but an early u/s moved my edd back 8 days from LMP, and I'm so glad it did! Otherwise she would have been 4 days "late."
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