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LMP vs ultrasound due date questions for both mom's and preggos

Forum: 2013 Playroom


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  • 1 Post By Ruthysb

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August 22nd, 2013, 05:14 AM
Join Date: Jan 2013
Posts: 211
I'm due aug 20 via ultrasound, but by LMP I'm due aug 28th. I very much want to avoid a scheduled c section on Aug 30. This is the latest that the dr will allow me to go, provided I pass my NST on monday.

But I keep thinking, I know exactly my last period and the only time I DTD to get pregnant. So 8 days makes a huge difference in due vs overdue baby. Aug 30 is only 2 days past my due date while aug 20 ultrasound puts me 10 days late.

I would like to know who went by their LMP due date and who went by Ultrasound due date and which was closer to your actual birth?
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August 22nd, 2013, 06:17 AM
Posts: n/a
My doctor goes by LMP as long as you know within a day or two when it was. I wast sure and my scan put baby a week over when I thought my LMP was.
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August 22nd, 2013, 07:07 AM
Mega Super Mommy
Join Date: Jun 2006
Posts: 1,574
My doc goes with a combo of both, but my babies have always typically measured right on target with my LMP.

Proud mama to
Cameron Alexander ---- January 11, 2000
Cassidy Skye ---- May 5, 2005
Callen Jase ---- August 23, 2013

~Angel Mama~ to

Caleb Jan 21, 1999
Carys April 29, 2011

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August 22nd, 2013, 07:27 AM
Super Mommy
Join Date: Dec 2012
Posts: 707
My LMP put me at August 26 but two early US put me 20 or 22 depending on which dr you ask. Lol. I was told 20 up til last week now they using 22. And I am getting cervadil today so no clue when baby would have come on its own. They won't let me go past 40w due to AMA.
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August 22nd, 2013, 07:53 AM
LadyGamer's Avatar Objection!!!
Join Date: Jun 2008
Location: Toronto, ON
Posts: 12,480
Mine was always spot on, at July 28.

Thank you, Jaidynsmum, for the amazing siggy

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August 22nd, 2013, 08:57 AM
UrbanMomma's Avatar Platinum Supermommy
Join Date: Feb 2007
Location: Somewhere near Detroit, MI
Posts: 8,975
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By LMP I was due July 25th, but I have longer cycles than the traditional 28 day cycle. So I was going by July 30th. By a speedy 8 minute u/s at 19 weeks they decided my edd was August 9th.

Evaani was born August 13th. So closer to the u/s edd....BUT she has signs of being post dates, calcification of the placenta, dry, cracking skin, very long fingernails.

So I think my original date of July 30th was closer to correct.
Jenifer....The Queen Bee
Nehemiaah Franklin 11/10/14 4:16am 9lbs 9oz
Welcome to the world lil' man!!
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August 22nd, 2013, 11:48 AM
BeachMum's Avatar Mega Super Mommy
Join Date: Jan 2011
Posts: 4,219
I had a miscarriage on November 16th and never got my cycle back before getting pregnant again. By ultrasound I was due August 16th, which is the date my ob used, by conception date, I was due the 23rd. She came on the 10th but my ob said shes pretty sure my due date was actually the 23rd based on the vernix on her skin, which I knew all along based on the only time we dtd

My little girl was 13 days early but was healthy and scored 9/9 on her apgars.
Mom of 2 girls and 3 boys
Missing my 4 angels too precious for this earth: 2/22/04, 12/13/06, 4/22/08, 11/16/12

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August 22nd, 2013, 08:49 PM
Mega Super Mommy
Join Date: Oct 2008
Posts: 2,580
My due date was right on according to ultrasound and lmp. I know because Caelyn was conceived on my birthday. I just had to wait 9 mths to get my "gift"
~Thanks to Kiliki for my beautiful signature~

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August 23rd, 2013, 04:44 AM
Join Date: Dec 2012
Posts: 205
By lmp I was due 8/15. By early ultrasound 8/12. The midwives I saw to begin with used 8/15, but when I changed to a dr. practice I guess they preferred the earlier date, so it has been a bit of an issue for me to (since I STILL haven't delivered).
lexiandolive likes this.
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August 23rd, 2013, 06:18 AM
Platinum Supermommy
Join Date: Jul 2008
Location: Southern California
Posts: 6,296
LMP I was August 4th, early ultrasound put me at 7/28. She came due to medical necessity on July 16th, so I was either 37 or 38 weeks. She was big and healthy (my biggest baby, and all were born at 37). So maybe the early ultrasound was right, but I had GD so that complicates things too.

Thanks so much *Kiliki* for my awesome summer siggie!
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August 23rd, 2013, 07:05 AM
Super Mommy
Join Date: Mar 2008
Posts: 644
Hi, I'm from the Sept DDC and wanted to share. With my first son, my due date according to lmp was October 8th and due date according to ultrasound was October 16th. He was born three hours before his due date on the 15th. This pregnancy, due date according to lmp was September 13th but ultrasound said I'm due September 24th. We will see how this goes since this baby is already a low 7 lbs and uterus measures at 39 weeks and I just turned 35 weeks this week. I'm curious to see how this turns out this time around too. Both ultrasounds with both babies were also done by the same ultrasound tech.

Thank you Kiliki for this beautiful siggy!

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August 25th, 2013, 06:20 AM
carolinashore's Avatar Veteran
Join Date: Oct 2010
Location: Virginia
Posts: 487
My due date by my LMP was 8/22. But my cycles have always been longer than average, and I know exactly when we conceived, as we only DTD once the entire month. Going by that, my due date was 8/26. The doctor went with 8/22, and toward the end they changed it to 8/16 due to an ultrasound. In the end though, he decided to come on 8/8.
Proud mama of Cody {02.06}, Luke {11.08} and Levi {08.13}
Missing our Angels {03.05 and 05.12}

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