Originally Posted by kikaaaso
I am going by fertility friend and my ovulation day. I ovulated on Feb. 10th and I am due Nov. 3rd. I am going with Jan. 27th for my lmp to keep the Nov. 3rd due date to give my dr. So I would say Jan. 28th would be right for you :)
28 Jan makes sense to me too, and it works in the EDD calculators, but I just can't figure out how ovulating two days "early" means that I move my LMP back three days! I suppose it doesn't matter as long as I get the right EDD, though.
Originally Posted by dejagerw
If I were you, I'd go with Jan 30. That puts your due date at Nov. 6. The Prem Rule is very accurate at predicting due dates. You take the first day of thermal shift, subtract 7 days and add 9 months. I used Feb. 13 as your 1st day of thermal shift. You'd much rather give your doctor a later LMP anyway, so that there is less pressure to induce when you hit 40 weeks. 1st babies usually go 41 weeks too.
Or just stick with your real LMP of Jan 31. That will pad your due date even more.
I hadn't heard of the Prem Rule--that's a really good thing to know about! I do agree with you that 13 Feb looks at least as likely for O as 12 Feb. I'm in the UK so likely my midwife wouldn't offer induction till 42 weeks. Also I'm not sure how accurate ultrasound dating is but I don't want to give inaccurate information and then cause issues if my dates don't line up with the dates from my scan.