OVULATION

[bevfly]

Ovulation is far more complicated than we think.I found this article and think it is very interesting regarding ovulation.Hope its of any help for anyone as i thought it was.http://www.ncbi.nlm.nih.gov/sites/ppmc/articles/PMC27529/report=abstract

[IM43]

Yes, unfortunately I think you are right about the over 40 eggs.  I do know that women our age who use donor eggs, usually get pregnant and carry to term without much effort... so I guess that tells the story enough right there.  For me... I would just never go that route.. I'm one who wants my and DH's genes.  I really just want my OWN child, being pregnant and carry a baby isn't what drives me.  I suppose if I just wanted "a" child, I would just adopt.

Just have to plug along and hope to catch the one or two good eggs that are left!!  I know they are in there somewhere.... hiding!

[bevfly]

Yeh i know hun you would think that more research is done on ovulation especially after 40?I do think that i have maybe ovulated earlier than i thought and obviously not produced  big enough quality eggs?Definately think that over 40 eggs are a big problem.

[IM43]

Thanks Bev, that is interesting.  I do know that one of my cycles I O'd on cd7!  I would have never thought that I would need to start the BD cd4,5 or 6.  I have noticed that when I do ovulate somewhat regularly it is many times around cd10, which is still really early.  What I don't know is that if one ovulates that early, it seems to me that the egg may not be mature enough and/or the lining may not be thick enough.  I suppose this is part of the problem with us older women.  It's all so confusing and I think a major problem... not to blame them.... is that the medical people really don't know that much about ovulation and fertilization  As more and more of us women are waiting to start a family until later in life... just for tax purposes (LOL), you would think they would put more effort into figuring all this out so that us older women are reporducing.

[bevfly]

I am not so good with trying to put things on here from online sorry.

[bevfly]

Sorry this is the page ooops.  


Journal List > BMJ > v.321(7271); Nov 18, 2000 Formats:Abstract | Full Text | PDF (211K)
  
BMJ. 2000 November 18; 321(7271): 1259–1262.  PMCID: PMC27529

Copyright © 2000, BMJ
The timing of the “fertile window” in the menstrual cycle: day specific estimates from a prospective study
Allen J Wilcox, branch chief,a David Dunson, investigator,b and Donna Day Baird, senior investigatora
aEpidemiology Branch, National Institute of Environmental Health Sciences, Durham, NC 27709, USA, bBiostatistics Branch, National Institute of Environmental Health Sciences
Contributed by
Contributors: AJW designed and directed the original study, conceived the data analysis, interpreted the results, and drafted the manuscript; he will act as guarantor. DD developed the statistical models, conducted the analysis, and helped interpret the results and compose the manuscript. DDB codirected the study, managed the steroid analyses, and helped interpret the results and compose the manuscript.
Correspondence to: A J Wilcox ***@****
Accepted August 30, 2000.
This article has been corrected. See BMJ. 2001 January 6; 322(7277): 28.

This article has been cited by other articles in PMC.
Abstract
Objectives
To provide specific estimates of the likely occurrence of the six fertile days (the “fertile window”) during the menstrual cycle.
Design
Prospective cohort study.
Participants
221 healthy women who were planning a pregnancy.
Main outcome measures
The timing of ovulation in 696 menstrual cycles, estimated using urinary metabolites of oestrogen and progesterone.
Results
The fertile window occurred during a broad range of days in the menstrual cycle. On every day between days 6 and 21, women had at minimum a 10% probability of being in their fertile window. Women cannot predict a sporadic late ovulation; 4-6% of women whose cycles had not yet resumed were potentially fertile in the fifth week of their cycle.
Conclusions
In only about 30% of women is the fertile window entirely within the days of the menstrual cycle identified by clinical guidelines—that is, between days 10 and 17. Most women reach their fertile window earlier and others much later. Women should be advised that the timing of their fertile window can be highly unpredictable, even if their cycles are usually regular.

--------------------------------------------------------------------------------

Articles from BMJ : British Medical Journal are provided here courtesy of
BMJ Publishing Group PubMed articles by these authorsWilcox, A. Dunson, D. Baird, D. PubMed related articles
Changes with age in the level and duration of fertility in the menstrual cycle. Hum Reprod. 2002 May; 17(5):1399-403.
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ReviewIdentifying the fertile phase of the human menstrual cycle. Stat Med. 1991 Feb; 10(2):221-40.
[Stat Med. 1991]
ReviewThe probability of conception on different days of the cycle with respect to ovulation: an overview. Adv Contracept. 1997 Jun-Sep; 13(2-3):83-95.
[Adv Contracept. 1997]
» See reviews... | » See all...

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