Starts from the 1st day of Last Menstrual Cycle and not the day of ovulation.
This helps to date the pregnancy more accurately as most women are unaware of their ovulation date.
2006-06-16 01:57:34
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answer #1
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answered by Emma Woodhouse 5
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I believe first day of last period, but you arcutually pregnant for 9 1/2 to 10 months.
2006-06-16 01:45:11
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answer #2
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answered by mikemadie 4
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From the first day of your last period. Then to work out your due date add on seven days from the first date of your last period and count on nine months, this will give you the date your baby is due!
2006-06-16 12:14:16
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answer #3
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answered by Anonymous
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They calculate it both ways...the ways you just mentioned. I think most doctors calculate from the first day of your last period. That's why *technically* you're pregnant for 9 1/2 months. :)
2006-06-16 01:58:53
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answer #4
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answered by brevejunkie 7
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from your last period.
there is no true way to tell when exactly you ovulate, so it's from your last period.
they used my last period even though i knew the exact day that i conceived. that's why i'm pretty sure my due date will be about a week later than what the dr. said;)
2006-06-16 01:59:17
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answer #5
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answered by joey322 6
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most doctors calculate it from the FIRST DAY OF YOUR LAST PERIOD! 40 weeks
unless you can exactly pinpoint your ovulation, then you can count it from there! 38 weeks
2006-06-16 05:43:17
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answer #6
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answered by Sarah R 2
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I think it is the last day, but it does not really matter which, your talking days which don't make a lot of difference when you are looking at 40 weeks (or 38,39,41,42...)
2006-06-16 01:49:04
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answer #7
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answered by dbzgalaxy 6
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Its from the 1st day of your last menstrual cycle. (the 1st day of your last period)... In reality conception happens later.
2006-06-17 01:58:15
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answer #8
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answered by Violent and bored 4
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Well it's the first day of your period but when you go to the hospital they then date you from the scan so neither really
2006-06-16 01:44:06
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answer #9
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answered by Cherryburst 2
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The first day of your period. Cause they cant pin point when you ovulated.
2006-06-16 01:50:09
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answer #10
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answered by JustWondering 3
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