Gestational age question

misspuppychow · January 2016

I'm asking for my SIL since she doesn't do these message boards. Her cycles are very regular and always have been. Her LMP was 9/22/2015. Based upon that, her EDD should be July 6, 2016. However, at both of her ultrasounds so far, baby's measurements showed an EDD of June 28, 2016. I have heard of due dates being off the other way (ovulating late) but this would put her ovulating at CD 6 and she was still having her period on CD 6. Any thoughts as to what happened? Did baby just grow at warp speed? She does chart/temp and her chart showed ovulation at CD 15.

lotsofsunshine · January 2016

I just entered the date of her LMP in to the due date calculator I use, and it said Jun 28.

bsckgb7 · January 2016

^^WSS - I get June 28th too

1faceinacrowd · January 2016

When I found out I was pregnant in October (the one that led to a m/c), my EDD was July 1st and my LMP was 9/25, just a few days after your SIL's. If my period started three days after hers, then my due date would also be three days after hers. So, her due date should be June 28th, as PPs calculated as well.

misspuppychow · January 2016

@1faceinacrowd, @bsckgb7, @lotsofsunshine ... I used my LMP today instead of hers. Ooops.

Her LMP was 9/30/15. My bad.

bsckgb7 · January 2016

At my most recent ultrasound, I was 9w1d based on LMP. Based pn the ultrasound, I was measuring 10w2d. I know my O date (using an RE). They just grow at different rates depending on the week. I also wonder if the tech's can measure differently.

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