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So...I was using cyclebeads to chart my cycle when I became pregnant in August. Because I was documenting the start of all of my periods, I am 100% certain of the first day of my last menstrual period & can actually note on the calendar when we had sex/probable conception date.<br><br>
Does this mean that I more than likely will not go past 40 weeks since my LMP date was dead-on? I think I read somewhere that true overdue babies are more often than not that the mother did not know her dates or an ultrasound dated it wrong.<br><br>
Wanting some wishful thinking confirmed!! Haha.<br><br>
38 weeks today and counting, please let it be only a 2 week wait MAX!<br><br>
Thanks for any info/links!
 

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I am wondering the same thing...
 

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I can't say for sure, but wouldn't count on it (based on my own experience). We were charting & temping when I got pregnant, and so I also am fairly positive of the conception date. Here's the bad news... I'm currently 40w+2. <img alt="" class="inlineimg" src="http://www.mothering.com/discussions/images/smilies/greensad.gif" style="border:0px solid;" title="greensad"> From what I've been told 40-weeks is really just an average. It's not until you're past 42 weeks that you're really considered overdue. Sorry for the bad news, but I'll send "due date vibes"your way and hope that your LO comes sooner rather than later.
 

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'fraid not. I wish it were true as I am totally certain of my dates also.<br><br>
Apparently when Naegle first described the length of human gestation he was working on a lunar month of 30 days. In fact a lunar month is a bit less than 30 days (29.something I think) which makes gestation closer to 42 weeks than 40 weeks.<br><br>
This is a quote from <a href="http://www.birth.com.au" target="_blank">www.birth.com.au</a> about due dates...<br><br>
"One study found that the average length of a human pregnancy was about 40 weeks + 8 days for first time mothers, and 40 weeks + 3 days for mothers having their second or subsequent babies.<br><br>
If women were left to go into labour spontaneously without being induced:<br><br>
About 50% would have their baby between 39 and 41 weeks and up to 88% between 38 and 42 weeks.<br><br>
5% of babies would be born on their actual due date.<br><br>
6 to 7% of babies would be born premature (before 37 weeks).<br><br>
If not induced, a very small percentage of babies would be born after 42 weeks."<br><br>
Probably not what you wanted to hear. Me either, sorry <img alt="" class="inlineimg" src="http://www.mothering.com/discussions/images/smilies/greensad.gif" style="border:0px solid;" title="greensad">
 

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Yep, I'm certain of my dates and I'm now 40 + 2. I was also certain of my dates for my first and I went to 41 + 1. Like you I wish that knowing dates=baby by 40 weeks!
 
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