WOMENS-HEALTH Messages for March, 2000: Re: 7weeks pg fetal pole &hb, sac too small

Re: 7weeks pg fetal pole &hb, sac too small

From: Lynn D. Montgomery, MD (anonymous@obgyn.net)
Wed, 22 Mar 2000 12:37:34 -0600 (CST)

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At Wed, 22 Mar 2000, anonymous wrote: >
>I am seven weeks pregnant (only previous pregnancy ended in
>miscarriage). I had some spotting which now seems to have stopped. The
>ultrasound this week showed a fetal pole and heartbeat normal for dates
>but the sac half the size it should be 8mm instead of 14mm. The midwife
>was not able or willing to give an idea of the likelihood of success of
>the pregnancy but I got the feeling that the chances are poor. She said
>that I may miscarry within the next week. Has anyone heard of this
>before? Or have any idea of the causes? I feel so depressed but if
>things aren't going to work I'd still rather know now than hang on to
>false hopes.

If the fetal crown-rump length is appropriate for gestational age and there is a fetal heart beat with a normal rate (ie 110-160), I really don't see a problem. The sac size in this circumstance for me is not really a big deal. Seeing fetal cardiac activity with a normal rate gives an 85% chance of having a successful pregnancy outcome. Unless there are more findings not related, I don't see as dark of an outcome as your midwife.

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

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