Dating Ultrasound/EDD Question

[kelle017]

I'm totally overthinking this but thoughts?

So I thought I had ovulated on cd17 based on an opk and cm, but I had a huge temp spike which would say cd19 and I know that's the indicator anyway.

The tech at the ultrasound last week estimated my edd to be 2/1 which would have meant a cd17 ovulation, and the office called to let me know that again today.  So this is the date that they will be using.

Should I just stick with the 2/3?  It really doesn't matter much except that dd was overdue (born at 40 weeks 6 days) and I'm hoping for a vbac, but if I need a c-section I'd want to give myself a few extra days.

Am I making sense?

[bee]

I think I get what you are saying. I personally being in the same RCS/VBAC boat would choose the later date I think.

[kelle017]

bee, I know 2 days doesn't seem like much but dd apparently needed extra time so I don't want to force this baby out early if necessary.

[britterrss]

I also have a question about dating ultrasound. I have an appt on Monday for pregnancy confirmation at six weeks. I don't know the exact day I ovulated but think I'll be 6 weeks exactly on Monday, at the latest.... I may even be 5 weeks 6 days or something - will they be able to see anything, even a sac?

edited: spelling

[bee]

Jun 17, 2015 10:16:56 GMT -5 kelle017 said:

bee, I know 2 days doesn't seem like much but dd apparently needed extra time so I don't want to force this baby out early if necessary.

I totally agree, that's why I would want the 2/3. Even though it's only two days, it's still two days.

[bee]

Jun 17, 2015 10:20:37 GMT -5 britterrss said:

I also have a question about dating ultrasound. I have an appt on Monday for pregnancy confirmation at six weeks. I don't know the exact day I ovulated but think I'll be 6 weeks exactly on Monday, at the latest.... I may even be 5 weeks 6 days or something - will they be able to see anything, even a sac?

edited: spelling

I like this site. You can click on different weeks to see different ultrasounds.

www.baby2see.com/development/ultrasound_sonogram/first_trimester_scans.html

[britterrss]

Jun 17, 2015 10:28:00 GMT -5 bee said:

Jun 17, 2015 10:20:37 GMT -5 britterrss said:

I also have a question about dating ultrasound. I have an appt on Monday for pregnancy confirmation at six weeks. I don't know the exact day I ovulated but think I'll be 6 weeks exactly on Monday, at the latest.... I may even be 5 weeks 6 days or something - will they be able to see anything, even a sac?

edited: spelling

I like this site. You can click on different weeks to see different ultrasounds.

www.baby2see.com/development/ultrasound_sonogram/first_trimester_scans.html

Ahhhh thank you that helps!

[wicked22]

Last time my doctors office tech gave me 11/13 and the ER tech gave me 11/15. The doc stayed with his date but I personally went with 11/14 because it was in between, on a Friday, and easy to remember. Of course non of that mattered when I got sever pre-e and they took him out 8 weeks early. So far the free clinic has giving me a due date of 2/7 which is a Sunday and when I finally go to the new OB I'll see what date they give me and go from there. It's estimated so if you personally adjust just a day or to it wont matter much.
ETA: I'm also in the RCS/VBAC group and haven;t decided which way to go but i might be leaning toward RCS if I'm giving the option and make it that far. 

[akraus2015]

Jun 17, 2015 10:28:00 GMT -5 bee said:

Jun 17, 2015 10:20:37 GMT -5 britterrss said:

I also have a question about dating ultrasound. I have an appt on Monday for pregnancy confirmation at six weeks. I don't know the exact day I ovulated but think I'll be 6 weeks exactly on Monday, at the latest.... I may even be 5 weeks 6 days or something - will they be able to see anything, even a sac?

edited: spelling

I like this site. You can click on different weeks to see different ultrasounds.

www.baby2see.com/development/ultrasound_sonogram/first_trimester_scans.html

Okay this might reveal how seriously uneducated I am about how pregnancy works, but I didn't realize until looking at this that you could tell as early as 8 weeks if you're having twins.

[kellybenelly83]

Jun 17, 2015 10:20:37 GMT -5 britterrss said:

I also have a question about dating ultrasound. I have an appt on Monday for pregnancy confirmation at six weeks. I don't know the exact day I ovulated but think I'll be 6 weeks exactly on Monday, at the latest.... I may even be 5 weeks 6 days or something - will they be able to see anything, even a sac?

edited: spelling

I saw a sac, and a yolk sac at 5weeks 3 days. You might see the same or a bit more or less, depending on the machine /tech/etc/. But you should be at least able to see a sac.

[britterrss]

Jun 17, 2015 10:37:08 GMT -5 akraus2015 said:

Jun 17, 2015 10:28:00 GMT -5 bee said:

I like this site. You can click on different weeks to see different ultrasounds.

www.baby2see.com/development/ultrasound_sonogram/first_trimester_scans.html

Okay this might reveal how seriously uneducated I am about how pregnancy works, but I didn't realize until looking at this that you could tell as early as 8 weeks if you're having twins.

Look again - they show 2 sets of twins at 5 weeks! WOAH!

[musicalsilver]

I think there are some practices that won't vary your due date by that small a margin once they've established it. So if you want to alter it, push for it now before it might be too late!

[allegro55]

Two days meant the difference between going into labor on my own and being induced with M, so I get what you are dealing with. I would go with the later date since you were charting.

[empireceo]

It is much easier to alter your date in the beginning of pregnancy when embryos grow pretty uniformly than to do it later. If you are hoping for a VBAC, take all the days you can get.

Incidentally, I think it's kind of bullshit that they put VBAC candidates on the clock right away. They have no idea how big your baby will be at 37, 39, 41 weeks, or what other complications may or may not come up during your pregnancy. If your care provider already mentioned to you something like this that could stand in the way of your VBAC and it's something you really want, I personally would at least consult with another care provider for another opinion.

Edited for better word choice.

[salsawifey]

You should go with the date your doctor gave you.

[musicalsilver]

Jun 17, 2015 13:57:01 GMT -5 empireceo said:

It is much easier to alter your date in the beginning of pregnancy when embryos grow pretty uniformly than to do it later. If you are hoping for a VBAC, take all the days you can get.

Incidentally, I think it's kind of bullshit that they put VBAC candidates on the clock right away. They have no idea how big your baby will be at 37, 39, 41 weeks, or what other complications may or may not come up during your pregnancy. If your care provider already mentioned to you something like this that could stand in the way of your VBAC and it's something you really want, I personally would at least consult with another care provider for another opinion.

Edited for better word choice.

This.  How VBAC friendly is your provider?  I know in my town there is one guy who is known for being *the* guy to go to for VBACs.  Someone like that would be good for you to support you in your decision. 

[auchick913]

Just to put another twist on things... I used to work nicu and they would automatically send any baby 34w6d or less to us unless it was obvious that the dates were very off (happened more than you'd think actually). So.. This probably wont be applicable but it does happen and is something else to consider.

[dreadpiratebuttercup]

I would take the later due date, for VBAC purposes. If you don't usually have a slow rise, and there were no reasons your temp should be off, I would trust your chart. The baby could just be measuring a little ahead, and will even out in the end.

akraus2015 My ultrasound was at 6w3d and two sacs were visible. The yolk sac and heartbeat were easily identifiable for baby A, but we weren't able to see as much for baby B. I was also only measuring 6w1d, but we know when I ovulated because I was being monitored and I did the trigger shot.

[lemoncupcake]

Jun 17, 2015 13:57:26 GMT -5 12345 said:

My practice almost always uses LMP to set the due date. (Unless you really don't know or you have very wonky periods). They set it and didn't give me any choice. I had an IUI. With my last pregnancy, using the LMP calculator I got one date, but using the date of ovulation or an IUI calculator, I got another date. My practice didn't care and used the LMP date. (Which was a couple days earlier than the IUI date). DD ended up being early, so none of that mattered in the end.

That's idiotic. I mean - they understand how ovulation and IUI works, right?

[chocolate]

I guess maybe this is a UO but I don't see how 2 days will make a difference. If you do a VBAC you'll wait until you go into labor, and if you do a RCS does your doctor typically do them at 39 weeks? 2 days at that rate isn't going to make a whole lot of difference. And if they are going by the baby's measurement then then it should be fine.

[dreadpiratebuttercup]

I'm not an expert on VBACs, but as far as I'm aware, most doctors won't allow you to be induced, and many won't let you go past 41 weeks. You either go into labor naturally, or you get a RCS. Those two days give you extra time to go into labor on your own. I could be wrong, though.

[empireceo]

Jun 17, 2015 15:37:54 GMT -5 dreadpiratebuttercup said:

I'm not an expert on VBACs, but as far as I'm aware, most doctors won't allow you to be induced, and many won't let you go past 41 weeks. You either go into labor naturally, or you get a RCS. Those two days give you extra time to go into labor on your own. I could be wrong, though.

At least in this area, some doctors will let you try to VBAC if you are induced, but statistically speaking, once you have one intervention, you are likely to have more, and the more interventions you have, the more likely you are to end up with a RCS. But you are right, that extra two days can make all the difference.

[kelle017]

Jun 17, 2015 15:37:54 GMT -5 dreadpiratebuttercup said:

I'm not an expert on VBACs, but as far as I'm aware, most doctors won't allow you to be induced, and many won't let you go past 41 weeks. You either go into labor naturally, or you get a RCS. Those two days give you extra time to go into labor on your own. I could be wrong, though.

I have heard this before and it's one of my concerns.  With dd my water broke at 40 weeks 5 days (she was born the next day) so that's why I'm nervous about forcing this baby out even via c-section if it's not ready.  

 I'm not entirely sure on my practice's policy on this, but I all ask at my appointment in July.  

[flockofmoosen]

Go with the date that gives you more time.

And for others worried about the LMP EDD not matching up with ovulation EDD, just lie about the LMP date. I did that with my first since I ovulated on cd17 and I didn't want to be considered late at the end of the pregnancy and unnecessarily induced.