PREGNANCY-BIRTH Messages for December, 2000: Re: dating a pregnancy

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Re: dating a pregnancy

From: Lynn D. Montgomery, MD (anonymous@obgyn.net)
Wed, 20 Dec 2000 23:09:27 -0600 (CST)

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In reply to: Vanda: "dating a pregnancy"

At Wed, 20 Dec 2000, Vanda wrote: >
>Could you please help me determine how far along I really am? An early
>ultrasound determined today 5w5d. But that would mean that I tested
>positive with a home pregnancy test at 8 days after conception (!) and
>started having morning sickness at 5 days after conception. Is this
>possible? Other things that make me unsure are the facts that my
>temperatures went up 4 days before supposed conception and last time we
>had intercourse was 2 days before supposed conception. I know that
>sperm can live for a few days, but still--the combination of all these
>factors makes me wonder how far along I really am. Your help is greatly
>appreciated.
>
>P.S. One last question--how many days could a transvaginal ultrasound
>be off at this stage? Thanks. -V.
>
>--
>Vanda
>

Vanda, The margin of error on an ultrasound at this gestational age is 3-4 days. I would tend to believe the ultrasound dates as much as anything. There is no way to absolutely predict the date of conception short of IVF. The date the ultrasound picks is as good as any... Lynn

--
Lynn D. Montgomery, MD
Director, Maternal-Fetal Medicine
Rocky Mountain Perinatal Center
Missoula, Montana

**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 e-mails cannot be entertained due to time constraints, consequently no private e-mails will receive a response.

**Thank you for your understanding ;-)

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In reply to: Vanda: "dating a pregnancy"

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