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The 1st day of my last period was April 6th, when I put that into EDD calculators I get a due date of January 11th and I am 4.5 weeks along. But then I see other people saying they are due right around then and are 5.5 weeks? I am so confused.... and yes, I should get this stuff after 3 kids :P
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I'm due January 6th and today I'm 5 weeks 1 day pregnant. My last "period" (it was really still part of a miscarriage because I was still testing +) was April 1st but my due date is based on ovulation (April 15th).
I bet some are basing their due dates on the first day of their last period and others on ovulation!
I think that you are right on. My last period was Apr 6th too, so my EDD would be Jan 11 (if I ever find out if I am preggo...argghh..). At least that is what the EDD calculators say. Like the PP said, some people calculate by LMP or conception date. Everyone has different length of cycles and the EDD is not usually right on. I know that I have babies at 42 weeks, not 40.
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I think that you are right on. My last period was Apr 6th too, so my EDD would be Jan 11 (if I ever find out if I am preggo...argghh..). At least that is what the EDD calculators say. Like the PP said, some people calculate by LMP or conception date. Everyone has different length of cycles and the EDD is not usually right on. I know that I have babies at 42 weeks, not 40.
when are you testing! Is AF late?
well now I'm confused...I just used this calculator based on conception and it said: Congratulations! Your estimated due date is Friday, January 06, 2012, which means you're in week 6 day 1 of your pregnancy.
Hmm.....maybe it's the IN my sixth week thing that's important even though I'm 5 weeks 1 day along. Clear as mud?
Ok that calender, the what to expect is just off. I its telling me I am in week 6 day 5 of my pregnancy when I know for a fact with out doubt that I am in week 5 day 4.
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http://www.babymed.com/pregnancycalendarandcalculatorweekbyweek
this calculator is pretty cool!
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I know EDD is jsut an estimate of course but anyone due on a certain day should be the same amount along as anyone else due on that day... ya know?
an EDD of 1/11/12 would be 4w4d along today
I am 5w6d and I am due January 2nd.
Christine, mom to C(7.5)  E(5)  J(3)  B(10 mos)
Doula, childbirth educator, Coleader of
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Here's another good calculator, by conception or by LMP. It tells you how far along you are now, and when each trimester starts/ends. The what to expect one is confusing.
Now I am confused too! First day of my last period was also April 6th, and midwife said my due date is January 15th! Hmm....Oh, and too funny that so many of us started on the same day, lol
Me
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Wife/SAHM/Musician. Mother of 3 boys: William (8), Tristan (6), Lukas (3) and another baby on the way
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If they ask your LMP to calculate by that, they may also take into account your normal cycle length if you know it. Obviously, the whole thing would make a lot more sense if all of us were taught to know when we ovulate and the docs used that information, instead of using the LMP and generally assuming all of us ovulate on day 14 of every cycle.
Also, when I was preg with DS, the midwife said she had 2 different wheels to calcuate due date (based on ovulation) and one said I was due one day later than the other. Must be a brand thing? Go figure. Not that one day matters, but it doesn't make sense.
We, the MW and I, chose to use the later date on paper. This was important, bc if their patients go past 42 weeks, they have to induce or transfer to the OB, so one day can make a difference with that. (A friend's OB induced automatically at 40w exactly if you hadn't delivered on your own!) So if you have a choice of more than one due date, I would always choose the *later* one officially to give yourself more time to avoid automatic interventions.
I am confused too...because on the calendars posted I am anywhere from 3 w to 5.5 w? Because my cycle length changes each month....can be 45 days or 21 days...I know I ovulated about 2.5 3 weeks ago though...but I didn;t record the exact date this time. I ahd been using homeopathics from my homeopatht hat made me ovulate much earlier than usual...and my luteual phase is usually only like 911 days but I was using vitex for two cycles and am assuminh since this bean stuck it was longer this cycle....confusing!!!
ETA: 1st day of LMP was april 8th and I believe it was a very early m/c and I bled over ten days...but seemed to have ewcm much earlier and think I o'd by the 22? ahh!
Both for LMP of 4/08/11 and O date of 4/22/11, your EDD is 1/12/12 and today you are 5w0d
Christine, mom to C(7.5)  E(5)  J(3)  B(10 mos)
Doula, childbirth educator, Coleader of
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thanks...different calculators were giving me different numbers...I am not 100% on the o date...
Holly and David
Adaline (3/20/10), and Charlie (1/26/12 4/10/12) and our identical twins Callie and Wendy (01/04/13)
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EDD is confusing. It depends partially on what method of calculation you use, too. Using the standard ones (which use Naegle's rule, which is WRONG, & which is sadly the ones the drs use) my due date is January 6th or 7th. Using MittendorfWilliams, which is much more accurate, I'm due January 16 or 17. Using Naelge with ds3, my due date was Feb 27. Using MittendorfWilliams, it was March 1. Ds3 was born March 3. I'm going with the Mittendorf date.
It's really easy to calculate for yourself. Count back 3 months from your LMP date. Add 10 days if you've had a baby already or you aren't Caucasion. Add 15 days if it's your first baby & you are Caucasion. I find it's easiest to look at a calendar to do it.
If you don't know the history, Naegle's rule is from the 1830's years ago & used a sample of just 34 women. MittendorfWilliams is from the 90's and used a much bigger sample.
http://chronicle.uchicago.edu/961107/pregnancy.shtml
Few women deliver exactly on their due date. A prospective study comparing Naegele's Rule with the MittendorfWilliams Rule(TM) found the latter to be twice as accurate as Naegele's Rule in predicting gestation.
Sorry, I'm kind of interested in due dates. So many unnecessary interventions could be avoided if drs used a more accurate dating method. I have no idea why they don't..probably because pharmaceutical companies don't make wheels using anything but Naegle's.
mom to all boys B: 08/01, C: 07/05 , N: 03/09 , M: 01/12 and far too many lost ones
This is really interesting. I've never heard of this. It is very close to my edd...it givesme the 18th jan and my edd is the 13/14th jan...how does this factor in u/s dating? my early us said jan 14th, my edd by lmp is the 13th....this gives me the 18th, dd1 was born feb 19th, due feb 6...
EDD is confusing. It depends partially on what method of calculation you use, too. Using the standard ones (which use Naegle's rule, which is WRONG, & which is sadly the ones the drs use) my due date is January 6th or 7th. Using MittendorfWilliams, which is much more accurate, I'm due January 16 or 17. Using Naelge with ds3, my due date was Feb 27. Using MittendorfWilliams, it was March 1. Ds3 was born March 3. I'm going with the Mittendorf date.
It's really easy to calculate for yourself. Count back 3 months from your LMP date. Add 10 days if you've had a baby already or you aren't Caucasion. Add 15 days if it's your first baby & you are Caucasion. I find it's easiest to look at a calendar to do it.
If you don't know the history, Naegle's rule is from the 1830's years ago & used a sample of just 34 women. MittendorfWilliams is from the 90's and used a much bigger sample.
http://chronicle.uchicago.edu/961107/pregnancy.shtml
Sorry, I'm kind of interested in due dates. So many unnecessary interventions could be avoided if drs used a more accurate dating method. I have no idea why they don't..probably because pharmaceutical companies don't make wheels using anything but Naegle's.
Personally, I go with the latest dating I can. It's always going to be a guessing game, but the later the date, the less pressure there is to induce andthe less risk of iatrogenic prematurity. If I had a provider, I'd figure out the latest due date for me & figure out what LMP to tell based on that date, so it works on their little wheel. As far as I'm concerned, I'm correcting for their non evidence based issues.
Since you've had a dating ultrasound, I'd just keep the later date in mind if you go "over". It might help to resist interventions, knowing that you could actually be due a bit later than they think.
mom to all boys B: 08/01, C: 07/05 , N: 03/09 , M: 01/12 and far too many lost ones
I had such an issue with this my last pregnancy! The due date calculators gave me one date and my doctor gave me another. It turned out that both "thought" they were giving me a due date based on a gestation of 280 days (a calculated average gestation from LMP to spontaneous labor that doesn't take other factors into account, such as previous deliveries), but the doctor's office was using a manually read circular chart. The nurse didn't have it lined up quite right (my doctor noticed that when I asked), and it was a leap year, which the chart didn't account for. So after many months of fretting and looking this up, including all the due date calculation methods, I finally explained the twoday discrepancy!
I don't really care what my official due date is. I knew even with my first that she would be very late because my family takes longer than average to gestate babies (my aunt even had twins a week late, and they have an older sister!). But it was interesting to learn about different ways of calculating and satisfying to solve the mystery of why my EDDs were off even when they were using the same method to calculate it. Now my doctor's office uses a computer and I have just one EDD, which my doctor and I know is most likely quite a bit earlier than I will actually deliver.
Dana
well now I'm confused...I just used this calculator based on conception and it said: Congratulations! Your estimated due date is Friday, January 06, 2012, which means you're in week 6 day 1 of your pregnancy.
Hmm.....maybe it's the IN my sixth week thing that's important even though I'm 5 weeks 1 day along. Clear as mud?
this one tells me i'm a week ahead of where i thought i was, too. lol.
http://www.babymed.com/pregnancycalendarandcalculatorweekbyweek
this calculator is pretty cool!
This calculator helped! Now I know where I stand. 9 weeks since last MP, but really about 8 weeks pregnant because of long cycle. Thanks!
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