when figuring out your due date

susanc07

did you go by your LMP or the date your doc gave you at your first u/s?

i did IVF, so i know when the date of conception was - right down to the hour. 

but at my first u/s my RE gave me a due date 3 days later than what i originally thought. 

i made my ticker based on the date of conception.  which do you go by?

Temp159135562506975

go by what your RE says... he's probably going off of implantation, not transfer I'd guess?

those of us who used ART to get pg would have no reason to go by LMP - which is generally not that accurate for the average woman.

either way - it doesn't matter much since you won't go to your true due date with a twin pg no matter what.  It was always so hard to answer "when are you due?" when i was pg... I'd say "due at the end of June, but twins always come earlier so who knows"

susanc07

Goldie_Locks_5:

go by what your RE says... he's probably going off of implantation, not transfer I'd guess?

those of us who used ART to get pg would have no reason to go by LMP - which is generally not that accurate for the average woman.

either way - it doesn't matter much since you won't go to your true due date with a twin pg no matter what.  It was always so hard to answer "when are you due?" when i was pg... I'd say "due at the end of June, but twins always come earlier so who knows"

i just assumed that those on this board who did not do ART would go by their LMP.  i did do IVF, so i went by my ER.  seeing those extra 3 days just makes me feel better. 

macchiatto

I charted so I went by my ovulation date rather than LMP; I know I ovulated on CD21 so going by my LMP would have been off by a week. The u/s dates matched up with my ovulation date.

Danse

Both my RE and OB use my ER date.

kimarino13

We went by ER date, and as of 9 weeks, the due dates on my u/s are matching this.  (Before that they were off a few days, but the u/s at the time was +- 7 days.)

susanc07

kimarino13:

We went by ER date, and as of 9 weeks, the due dates on my u/s are matching this.  (Before that they were off a few days, but the u/s at the time was +- 7 days.)

my RE goes by the ET date.  why would he do that?  

oh well, i am sticking with the ER date.  that puts me into my 9th week and makes me feel better.