Re: EDD discrepancy

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BTW, in our hospital, we don't try to suppress labor after about 34 weeks.

HSM

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

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• In reply to: Nikki: "EDD discrepancy"
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