Re: EDD discrepancy
From: Jody (anonymous@obgyn.net)
Wed, 3 Nov 1999 20:57:59 -0600 (CST)
I'm afraid I don't know much about this, but I went through something a
bit similar. My husband and I were also TTC, although we didn't take
temps or anything (it only took 3 weeks to conceive twins anyway) and I
got negative test results until I was 5 days late (August 8, my LMP was
July 6). I was given an EDD of April 13 and then, at 5 weeks pregnant,
I had an ultrasound which they felt put my due date back to April 23. I
never felt comfortable with that due date because my pregnancy seemed to
be progressing as if I was an extra week and a half along, and it made
me conceive these babies about a week before I got the positive result
and the home tests say it takes at least 2 weeks after conception to get
a positive.
I had another ultrasound on Thursday and they determined that I was, in
fact, another week further along than my due date indicated. So, my due
date has now been changed to April 17.
Anyway, my point is that it seems to be an iffy science. As long as
everything seems to be going well, I wouldn't be too worried about it.
With my first son, I KNEW I did not conceive anywhere near when they
said I had (my husband was away in the military for a full 2 weeks
before and after my estimated date of conception) and when they induced
me at 36 weeks they were amazed to find an approx. 38 week baby.
Good luck!
--
Jody
>At Tue, 2 Nov 1999, Nikki wrote:
>>
>>My husband and I were TTC: I was taking my basal temp, checking my
>>mucus, and keeping a calendar. I am very aware of my body and can
>>really feel my ovaries when I am about to ovulate. I ovulated on day 16
>>of my cycle - I was sore on one side for several days and then actually
>>FELT a popping sensation... I am sure that was when I ovulated.
>>
>>Later, when my period was just one day late, I took a home pregnancy
>>test which read a faint positive. My EDD, based on LMP, came to
>>December 6th.
>>
>>When I went for my first prenatal appointment at eight weeks (LMP) I was
>>told that, based on the size of the embryo, my EDD was December 17th.
>>The EDD was confirmed by my 20 week ultrasound - which I know is not as
>>accurate a barometer - the 20 week u/s said December 16th.
>>
>>I know that this is not possible because
>>
>>a) I KNOW the day I ovulated
>>b) That would mean that the home test I took was a false positive
>>because the baby could not have implanted by then, if the doctor's EDD
>>is correct.
>>c) After ovulation, my husband and I did not have sex for quite some
>>time.
>>
>>I am sure I am 35 weeks along, my doctor tells me I am 33 weeks along. I
>>am pretty sure I will go into labor early, maybe 37 or 38 weeks (my
>>EDD), because this is what my body does. The doctor says that if I go
>>into labor and it is not at least 37 weeks (her EDD) they will try to
>>stop my labor.
>>I very much do not want this to happen. On the other hand, the doctor
>>says that if it's real labor, they will be unable to stop it
>>effectively.
>>
>>My questions are: what would cause the embryo to measure so small on an
>>early ultrasound if the patient is sure of her date of conception? Late
>>implantation? Would a woman still get a positive pregnancy test result
>>if the ovum had been feritilized, but not implanted yet? What factors
>>contribute to late implantation? And doesn't late implantation
>>predispose one to early miscarriage?
>
>--
>Harvey S. Marchbein, M.D. FACOG, FACS
>Great Neck, New York
>
>**Note: Opinions expressed here are for educational purposes only
>and, as such, do not constitute a physician-patient relationship.
>This information is not intended to supplant the need for you to
>consult with your physician prior to choosing therapeutic options
>and/or interventions.
>
>**Private emails cannot be entertained due to time constraints,
>consequently no private emails will receive a response.
>
>**Thank you for your understanding ;-)
>
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