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Mothering › Groups › May 2014 Due Date Club › Discussions › so what week is the due date anyway?

so what week is the due date anyway?

post #1 of 30
Thread Starter 

Mkay, so I was marking my calendar today, and starting with my due date (May 13) as week 40, I went backwards to this week.  Only by that math, this week is week 8.  Its not, its week 6, at least per the online pregnancy calendar, so what week is the due date supposed to be?  Or did I just skip a couple weeks in there somewhere? so confused...

post #2 of 30

I get really confused between counting from the last period and counting actual weeks of gestation.  I think it's supposed to be 40 weeks from last period to delivery, i.e. 38 weeks of gestation.

post #3 of 30
How many weeks from your ovulation are you, if you know? Number of weeks from ovulation + 2 is how many weeks pregnant. Number of weeks since LMP is an approximation of that, but for me LMP would be off by a while week since I ovulated on cycle day 21 instead of cycle day 14.


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post #4 of 30
The fetus is 6 weeks and your 8 weeks pregnant because of the 2 week gestation period? I think that's right.. I'm confused myself.
post #5 of 30
Thread Starter 

well, my lmp started aug 6, and i wasn't tracking my ov, so a guesstimate would put my ov date at + 14 days, aug 20, which is still week6.  seriously confused, there literally aren't the right number of weeks left until may.  i double counted.

post #6 of 30
post #7 of 30
Its saying I should be 7 weeks this coming Thursday but my doctor is saying I'll be 6 and a half weeks. When I go for the ultrasound and they date it will they notice that?
post #8 of 30
Quote:
Originally Posted by TinaPa View Post

The fetus is 6 weeks and your 8 weeks pregnant because of the 2 week gestation period? I think that's right.. I'm confused myself.

 

No, it's 8 weeks because it's counting from LMP, so the two (on average) weeks between the first day of your last period and your ovulation date are included in the count, even though you aren't actually pregnant yet.

 

I would guess you and your doctor are coming up with different dates because you're going by ovulation date and the doctor is going by LMP, and you didn't ovulate exactly on day 14. If you have your ovulation day right, the ultrasound should agree with you (within a day or two). 

post #9 of 30
Thread Starter 
I am trying to mentally go with the latest possible due date and therefore the smallest possible week in my head. I get too excited otherwise smile.gif And last time I was mentally 6 days late so that really threw me off my game.
post #10 of 30
Same here. My lmp date was 8/9 with a 21 day cycle and according to my doc I'm 6 weeks this week but everything is saying I'm 7 so I don't know what to believe... Babymed says I'm 7 weeks http://www.babymed.com/pregnancy-calendar-and-calculator-week-by-week?pc_calendar_type=Weekly Count Calendar&pc_event=Last Menstrual Period (LMP)&pc_event_date=1376020800&pc_lmp_cl=21&pc_ud_week=5&pc_ud_day=0&pc_ivf_day=1 so that's what I'm sticking with. Anyone have insight?
post #11 of 30
Thread Starter 

I would stick with your doctor's official number and just enjoy being early if that happens.  

 

I am one to try and push official due dates a bit further in the future if that is possible, just because of my experience and the birth environment I live in.  After 42 weeks and 6 days, my birth choices literally become UBAC or CS, not a happy place.  Buuuut if I'm officiallly only 42 weeks life is still cool in my happy homebirth plan / non intervantionalist transfer world.  So I am always going to vote for happy happy happy.  Besides, the window for early is much bigger, 5 weeks early is the cutoff for homebirth around here.  Which is, granted, a pretty reasonable window considering how overallly legalized birth is most places that's a really nice space to have.  And I'm usually within a week of my due date.  But I have friends who have to worry about it so its generally agreed around here that a policy of , oh, gee, I'm EARLY by a day is much better than late by a week.  My former OB required visits every three days after 40 weeks, with two kids in tow that is something I would want put off if I am risked into her care.  Due dates are a modern estimate anyway, I plan to tell people I'm due in May, in general, and avoid the actual day in particular.

post #12 of 30
Well I go for my us Thursday and get a more accurate date.
post #13 of 30
Remember that US aren't that accurate and do have risks involved. Gentle Birth, Gentle Mothering by Sarah J Buckley is a great resource that lists pros and cons of many "normal" pregnancy things.

I always say to err on the side of the later date. Mentally it helps, other people won't start bugging you as much near your due date (lol) and if you are having a hospital birth, you're much less subjected to unnecessary early interventions.

Read up about ultrasounds. Unless you think there's something wrong, they're not worth the risk IMO.
post #14 of 30

I know. This being my first pregnancy though I'm over the edge in worry hoping that nothing is wrong so I want to at least make sure that there is a heartbeat so I can relax. I won't be doing any others until the 18 week us and after that nothing. I'm a natural worry wart.

post #15 of 30
Tina, you might consider skipping "the" 18-week ultrasound too unless there is some reason to suspect a problem. In my first pregnancy I had bleeding in the 6th week, so I had ultrasound to check if I was still pregnant. Seeing the heartbeat, spine, head, and 4 little paws was so reassuring, we decided we did not need to look again unless there was a good reason, and we didn't. It was exciting not knowing the sex until the birth! I am inclined to do things the same way this time, although since I am 40 now the midwives may want more tests.
post #16 of 30

The only thing is DH wants me to get everything done to make sure that everything is going smoothly and I don't think I can talk him out of the 18 week us unless there is another way to find out the gender. I'm thinking intelligender which we sell at my pharmacy, and if that can put enough ease on his mind about it, your right, there really is no need, but if my obgyn recommends it for some reason then I'm inclined to listen, but if all is well I don't think I will need it. I know the office I go through births one of those catholic hospitals, (it's called st. marys) and from what I understand they like everything to be done because they have several birthing options and need to make sure I'm not high risk or anything that would minimize my options. 

post #17 of 30
Sorry, but that's just hospital protocol, not necessarily for the health of your baby. Would you do something about your pregnancy if they did "find something"?

Trust in your body. Trust in your baby! Ultrasounds are not medically necessary unless there is a glaring reason for one. Ask your doctor the risks... If he says "none" he's not telling you the truth.

As with every parenting decision from here on our, the choice is yours. You go to sleep at night protecting that baby. All I say is that people should be fully informed and educated on their decisions... Not just blindly following advice because others "say so"
post #18 of 30
Thread Starter 
Quote:
Originally Posted by WendyJo410 View Post

As with every parenting decision from here on our, the choice is yours. You go to sleep at night protecting that baby. 

 Aww, that made me smile WendyJo.  :) 

post #19 of 30

I think that claiming ultrasounds are so risky as to be avoided by mothers who want to have them might be a bit exaggerated.  I realize that a discussion of u/s is a bit off topic, but if it's being called a risky medical procedure on this thread, perhaps it would be more balanced to say that some people perceive there are risks with ultrasound, while others do not?  I'm not suggesting that having concerns about doing what's best for your baby aren't valid, but I have yet to read any peer-reviewed research that suggests that diagnostic or dating u/s (i.e. the "standard" ultrasounds) cause harm.

 

As for the other suggestion of sticking with earlier dates, I highly support that!  I went to 43+3 with my first child but had a great OB wade in when the other doctors were getting all fretful and he decided that he'd push back my EDD by about 8 days, which gave me a bit of additional breathing room before they became really agitated about not inducing.  With my next child I was vague on dates, managed to get (what I think was) a later due date, and delivered only 10 days "late".  With this one, I am quite happy that they are going with my LMP and not when I think I ovulated, which was a bit earlier than day 14, plus I have a great, non-interventionist doc, so I think I should be fine for dates.  So silly how we all get so wrapped up in dates dates dates, when nothing is definite and the babe should come when ready!

post #20 of 30
Quote:
Originally Posted by manysplinters View Post
 

I think that claiming ultrasounds are so risky as to be avoided by mothers who want to have them might be a bit exaggerated.  I realize that a discussion of u/s is a bit off topic, but if it's being called a risky medical procedure on this thread, perhaps it would be more balanced to say that some people perceive there are risks with ultrasound, while others do not?  I'm not suggesting that having concerns about doing what's best for your baby aren't valid, but I have yet to read any peer-reviewed research that suggests that diagnostic or dating u/s (i.e. the "standard" ultrasounds) cause harm.

 

As for the other suggestion of sticking with earlier dates, I highly support that!  I went to 43+3 with my first child but had a great OB wade in when the other doctors were getting all fretful and he decided that he'd push back my EDD by about 8 days, which gave me a bit of additional breathing room before they became really agitated about not inducing.  With my next child I was vague on dates, managed to get (what I think was) a later due date, and delivered only 10 days "late".  With this one, I am quite happy that they are going with my LMP and not when I think I ovulated, which was a bit earlier than day 14, plus I have a great, non-interventionist doc, so I think I should be fine for dates.  So silly how we all get so wrapped up in dates dates dates, when nothing is definite and the babe should come when ready!

 

Let me be clear... Just because "you" have not read peer-reviewed papers on the risk of ultrasounds, that doesn't mean that there aren't any. In Sarah J Buckley, MD(s) book, Gentle Birth, Gentle Mothering, she cites both pros and cons for ultrasounds, with sources of peer reviewed articles on the risk of ultrasound. I would list them here but my book has been loaned out to another pregnant friend. I do not "perceive" them as risky. If you ask your OB, he/she will tell you there is a risk. I never said they were "so risky". Ultrasounds DO NOT  have a place in a pregnancy where your care provider feels everything is "normal". Ultrasounds have a place in pregnancy if there is a perceived anomaly or something specific needs to be looked at, in my opinion. Personally, I feel that one ultrasound probably will not do harm, but I do personally know two different mothers that were considered "high-risk" because of their age and had 6+ ultrasounds. Both babies have hearing problems and one of their OBs did admit to the fact that she has seen hearing issues in babies whose mothers receive numerous ultrasounds. Dating ultrasound - why is it necessary? The further along you get, fundal height will help closer match to what an expected due date will be. This link will give you a quick background on what I (also) believe to be pros/cons of ultrasounds: http://drfeder.com/?page=articles&action=viewArticle&articleID=308 (with peer reviewed articles)

 

Leave the baby alone and let him have the peaceful quiet environment of just hearing mama's voice (and papas voice and the dog, etc.)! Ultrasonic waves have been likened to being in the front row of a rock concert. Remember, fluid carries sound! This is why they try to do ultrasounds and even dopplers in the quickest amount of time when they are performed. Cell changes have also been noticed in ultrasounds on mice. 

 

By the way, kudos to your awesome doctor (and you) for going 43+3!

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