Would you fudge your LMP rather than explaining?

[Deleted]

So my previous cycle was 38 days and this month it looks like I'll ovulate on CD 23 or 24. That's a full 10 days past the assumed day 14. Would I be crazy to move my reported LMP if I get pregnant? I don't want to give up those 10 days - the difference between 10 days late and on time is a big deal once we're talking delivering a baby.

I could try to just explain that I was keeping track and know when I ovulated, but based on my last pregnancy, I don't think they'll go against the Wheel that gives due dates.

[tarheels]

Your doctor's office won't believe that you're charting and that you have reasonable certainty when you O'd, even when you've used OPKs? I'd probably find a new doctor; that just doesn't sit right with me. They're essentially saying, "we believe all women have 28 day cycles and we deny the medical truth to the contrary." Not cool!

I'd walk in with a copy of my chart, making sure that my chart has tons of info on it, and be prepared to argue with them, and then find someone new if necessary. But I'm a tenacious sort - DH has compared me to a terrier with a chew toy more than once

[blindyswife]

I would be tempted, yes. I think though, that you're betting off telling them you O'd late. If they don't change your EDD based on that, it could be confirmed with an early ultrasound. Very early on, they are able to date the pregnancy to the day based on how developed the fetal pole/sac/size etc etc. I had an early u/s with my son, and they dated him at 6week2days which was exactly right.

So maybe you could explain your concerns, that if they base your EDD on your lmp, that you would be considered overdue way, way sooner than necessary. Ten days is a lot when we're talking about a baking baby.

[Cheesecake]

How about, oh, I haven't written down my LMP, but I did temp and use opks and I Oed on date x. They can't make you know your LMP date!

Sent from my phone, please disregard typos

[thoseareradishes]

Nov 11, 2012 16:03:01 GMT -5 tarheels said:

Your doctor's office won't believe that you're charting and that you have reasonable certainty when you O'd, even when you've used OPKs? I'd probably find a new doctor; that just doesn't sit right with me. They're essentially saying, "we believe all women have 28 day cycles and we deny the medical truth to the contrary." Not cool!

I'd walk in with a copy of my chart, making sure that my chart has tons of info on it, and be prepared to argue with them, and then find someone new if necessary. But I'm a tenacious sort - DH has compared me to a terrier with a chew toy more than once

I agree. I would not fudge my LMP date.

[Deleted]

Last time, I stuck with my family doctor and only had the NT and anatomy scan.

This time, I would love to use a midwife.

I've done OPK since day 10 this month. I'm pretty sure I'm right, and when your doc typically only lets women go 10 days late before induction, 10 days is a big deal. Early u/s are not typical in Canada. I could maybe push for one, but if I'm lying one way or another, I'd rather just adjust things to a 14 day O.

[thatgirl2478]

My Doctor didn't believe me when I told them I had a pretty good idea of when I O'd - I didn't fudge my LMP either. They will give a rough estimate based on LMP AND your measurements on your first ultrasound. As it was, I was 10 days over due from my LMP due date and 5 days over due from my O due date. It didn't end up mattering.

[VillainV]

Don't the ultimately determine dates based on your ultrasound measurements? I mean yeah, they use your LMP at first until they can get a few measurements, but after that they go with the measurements. They will also adjust your LMP-derived due date based on your average cycle length, until the ultrasounds. I don't see how lying about your LMP would make a difference.

[Deleted]

I never had any early u/s with my previous pregnancy, and by the time you're doing NT at 11+ weeks, it's not accurate enough on dating.

10-12 days does matter. I'll probably ask first if she will consider my ovulation date in place of my LMP, and if she says no... then I'll adjust my date by 10 days.

[blindyswife]

Nov 12, 2012 0:31:33 GMT -5 VillainV said:

Don't the ultimately determine dates based on your ultrasound measurements? I mean yeah, they use your LMP at first until they can get a few measurements, but after that they go with the measurements. They will also adjust your LMP-derived due date based on your average cycle length, until the ultrasounds. I don't see how lying about your LMP would make a difference.

Along the lines of what token said- my practice doesn't do early ultrasounds on a routine basis. I got a 6wk u/s last time due to a previous ectopic, but they don't do that on the regular. Then once baby is so big, their measurements are no longer necessarily reflective of baby's age.

On that note, I think my practice only does one u/s at the 20wk ish mark, for regular non-high risk pregnancies. NOT ENOUGH, I say!

[Cheesecake]

Doesn't the pregnancy wheel also say when Ovulation is (as in 14 days after last period?)

As I said before, they can't make you tell them your last period. They can figure out when they think that should've been according to their deranged vision of cycles when you just tell them when you O-ed.

10-12 days on a full term baby might not be the biggest deal (39 and 41 weeks in NL are both definitely considered full term), but what if you deliver on the early side, then 10-12 days can suddenly be a ginormous difference (34 weeks v 36 weeks, yikes!)

On the positive side of things, I bet that a midwife is more open to you telling her about your cycle and O days and might not use the pregnancy wheel so religiously as a GP would do.

[Deleted]

I expect midwives would be more knowledgeable and open to information. I'll have to cross my fingers that I get in, though, as it's very hard to get a midwife spot. I'll be calling as soon as I get a bfp.

[demofea01]

Fingers crossed you can get in to see a MW! I would also just give her your ovulation date and let your know you've been using OPK's and BBT.