(Closed) Due date question.

posted 6 years ago in Pregnancy
Post # 3
4038 posts
Honey bee
  • Wedding: October 2010

@debwrb:  A lot of women don’t know when exactly they conceived, so most doctors calculate your due date based on the first day of your last menstrual period so there’s an across-the-board calculation for all women. It’s standard practice. If you knew the actual date you ovulated and put it into an online calculator, you’d get a very similar, if not exact, date. 


Post # 4
8146 posts
Bumble Beekeeper
  • Wedding: October 2012

i’ve heard that most women who track their own due dates are usually more acurate then the Doctor. and i heard also over the weekend from a friend that her doctor wanted to induce her because he thought she was past her due date, but actually she was only a week away from the one she tracked… so she waited and had the baby when SHE thought she would. i dont know if this helps… but i thought it was helpful to me.  ๐Ÿ™‚


EDited to add: CONGRATS!

Post # 5
1660 posts
Bumble bee
  • Wedding: October 2011

@debwrb:  I think you should tell them, but they might not change your due date unless the baby is measuring really off. My doctor’s office goes my LMP unless baby’s measurements are more than 9 days off in either direction. I think that’s crazy, but that’s what they told me! According to my doctor, I am due 12/10, but according to my chart and my baby’s measurements, I’m due 12/6.

It seems like a bigger deal in your case because your baby is likely younger than they think. If your LMP was 2/4, your doctor is probably assuming you conceived on the 17th, so your baby is likely 1-8 days younger. That would be important to consider when you go for an u/s.  

Post # 6
1778 posts
Buzzing bee
  • Wedding: August 2010

A November 11th due date is based on you conceiving on around February 19th.  They look at your first day of last period as a starting point and base it on a 28 day cycle (which puts you at Feb 18th or 19th).  So no they will not change your due date based on this information.  They may do an ultrasound to confirm dating, and THAT could wind up changing the date. Hope that helped ๐Ÿ™‚

Post # 7
5670 posts
Bee Keeper
  • Wedding: August 2010

I would share this information with your doctor, but based on your period ovulating 14 days into your cycle sounds like a perfect clockwork cycle. I’m sure your doctor will due an ultrasound too and it will help date the pregnancy. Congratulations

Post # 9
391 posts
Helper bee
  • Wedding: October 2010

Congrats! I knew that my due date was off, so I let the doc know at my first appointment. He had me go in for an U/S to date the pregnancy. They then changed my due date based on the U/S.

Post # 10
4038 posts
Honey bee
  • Wedding: October 2010

Oh yeah, that’s the other thing, when they do an ultrasound if the baby is measuring too many days off from your original due date they’ll change it then. 

Post # 11
6823 posts
Busy Beekeeper
  • Wedding: June 2011

I agree with PP about how you ovulated based off your last period. My son was predicuted based off of my last period last year Nov 14th.  Boy were they wrong, but that is because he came 7 weeks early!  Congrats by the way

Post # 13
634 posts
Busy bee
  • Wedding: July 2011

After I found out I was pregnant I asked for a dating scan, and my doctor was happy to give me one. She went off the date on my scan, which doesn’t line up with when I know baby was conceived- i know baby is just measuring small. I told her and my midwife this, but it’s ‘protocol’ I guess to go by the earliest scan date. There is about a week difference between when I know we conceived and their due date.

But, at the end of the day it doesnt matter because baby will come when she wants to so I don’t pay too much attention to it. 

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