00w00d, cycle length, what's the deal??

iVillage Member
Registered: 06-17-2003
00w00d, cycle length, what's the deal??
2
Tue, 09-09-2003 - 10:31am
Here's a question for my experienced sisters of the TTC board. I was thinking about the weeks the doctor tells you and how EDD is calculated.

In my case, I have a 24 day cycle, Oing on CD 14. When I got my BFP I was considered 3w5d preggers. The embryo was just 11 days. So I have an EDD of 5.12.04 (give or take a day). Right now I'm 5w and the embryo is just under 3 weeks old.

If someone has, let's say, a 38 day cycle and Os on CD22 and they test the day AF is due, the embryo would be 16 days. Even though this person's embryo would only be 5 days older than mine, they would be considered 5w3d. That's almost a full two weeks longer than I am.

So how far along you are really doesn't reflect anything. It's fetal age is the most important thing! I can't believe that I never thought of this before. No wonder there are some people that can't hear the HB at 12 weeks. The fetal age may not reflect the perfect 28 day cycle docs seem to think we have.

Do I make since?

Cat

iVillage Member
Registered: 03-27-2003
Tue, 09-09-2003 - 11:31am
FF counts w/d based on your ovulation date, which is much more accurate than the little wheely thing the ob's office normally uses! I ovulated on CD15 so I'm only one day 'behind' what the wheel thingy would put me at but I've had pg cycles where I've ovulated on day 9 and one where I o'd on day 22! So yep, it's a good thing we know our cycles or we'd be really confused *lol*

di & #2, edd 5-16-04

iVillage Member
Registered: 07-02-2003
Tue, 09-09-2003 - 12:47pm
Your post makes total sense.

I just read about this somewhere and my poor addled brain cannot remember where.

My "poor" memory (don't yell at me if its wrong) had to do with actual pregnancy from *conception* date being 38 weeks BUT since most people, aside from us actual TTC'ers, don't know whey they ovulate and actually conceive, so they (the med community) base the 40 weeks on the last AF date. Hence the two week discrepency. And of course that two weeks or 14 days is based on a 28 day cycle and Ovulating on day 14.

BUT REMEMBER THIS!!!!, you "KNOW" when you conceived, stick to that when you talk to doctors etc, I am also a short cycler also and I know I will have to battle about when I am due (when it happens) Because the whole 28 days 14 days numbers don't work for me.

Congrats!!!!