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Q: Morning Sickness Duration and miscarriage risk ( No Answer,   3 Comments )
Subject: Morning Sickness Duration and miscarriage risk
Category: Health > Women's Health
Asked by: baf_seattle-ga
List Price: $15.00
Posted: 03 Jan 2005 18:14 PST
Expires: 02 Feb 2005 18:14 PST
Question ID: 451368
For successful (baby delivered) vs. miscarriage pregnancies, (1) what
is the range of start and end dates (in weeks starting from the first
of last period - LMP) for morning sickness, and (2) how variable (on a
day-to-day basis per person) can the morning sickness symptoms be?

I know that some women experience many symptoms and they can last all
day, starting from 5 weeks (since LMP) and continuing for the whole
first trimester (i.e. until 12 weeks).  On the other hand, some women
barely feel any symptoms.  I think there are studies which show that
fewer and minor symptoms means there is a higher miscarriage risk -
but there are probably studies which show no correlation.

This question, as you may guess, is because my wife (who has had a
previous miscarriage) has had morning sickness symptoms (nausea,
fatigue) all-day, starting at 5 weeks since LMP.  However, it is now 7
weeks, and for the past two days, the symptoms have mostly stopped. 
We had an ultrasound, and the embryo looks good (right size and good
heartbeat), but we are concerned about the lack of symptoms.  Maybe
there is an impending miscarriage?  Maybe the morning sickness is all
done?  Maybe lots of women feel sick for a while, then suddenly feel
better, then get sick again - but the pregnancy is a success?  Our OB
tells us not to worry about the lack of symptoms - the ultrasound is
the most important piece of information... but we are both concerned. 
Our first pregnancy miscarried about 1 week earlier than we are now
(after seeing a heartbeat).

After searching Pubmed and the web, I am having an exceedingly
difficult time finding a good study or review of this type of
information.  There are plenty of sites where people ask questions and
have discussions on bulletin boards, but this is not a good source of
information and they never seem to report the results of the

Given all the pregnancies and miscarriages out there, you'd think that
SOMEONE could put approximate numbers on these questions.

My last, related question is (3), when someone has more than 3
consecutive miscarriages (recurrent miscarriage), are they typically
all very similar or unrelated?  i.e. do they all last 6 weeks then
end? or do they never make it to 6 weeks?

For (2), I am hoping that some evidence can be shown which says
something like "half of women have nausea 5 out of 7 days per week,
and half have it every day"

For (1), something like "50% of women with successful pregnancies have
symptoms from week 5 until week 10, 30% have symptoms from week 5
until week 8 and 25% have no symptoms"  .. then a similar statement for
pregnancies which end in miscarriage.

Or the data can be in a table or a graph?

The answer does not need to be on the web.  You can list a few papers
on pubmed or references to a book with an excerpt in quotes.  I will
even take an answer based on your own experience - if I can contact
you privately to confirm your name and level of experience or

Clarification of Question by baf_seattle-ga on 04 Jan 2005 16:06 PST
If anyone is interested in answering this question, you can skip part (3).

Also, I have found some papers (on pubmed) which are getting close to
answering part (1).  For example, here is a good reference:
Pubmed ID: 8373648

I am still very curious about part (2) - the day-to-day variablity of
symptoms for a given person.

There is no answer at this time.

Subject: Re: Morning Sickness Duration and miscarriage risk
From: crabcakes-ga on 04 Jan 2005 19:41 PST
You might find some information in these articles helpful:

Regards, crabcakes
Subject: Re: Morning Sickness Duration and miscarriage risk
From: drphiljr-ga on 13 Mar 2005 05:41 PST
I have not seen anything that breaks morning sickness down the way you
ask.  Miscarriage occurs in 1 out of every 15 pregnancies.  70% of
women have morning sickness symptoms.  For some the actual symptoms
occur in the morning for others it is at different times of the day. 
The absence of morning sickness is normally seen as a blessing.  Here
is an article on morning sickness and one on miscarriages
Subject: Re: Morning Sickness Duration and miscarriage risk
From: lalah143-ga on 04 Jul 2005 11:44 PDT
To the original gentleman who posed the question -- what was the
outcome of your wife's pregnancy?  I am in the same situation -- 7
weeks pregnant, sudden cessation of nausea -- and wonder how concerned
I need to be.  I can be emailed directly at

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