Dates confusion!

MommaChrissie27

Hi ladies. I know it's a lot of reading, but here is a timeline of my current (somewhat anxiety-inducing) situation: 

30th September = LMP started.

4th October = LMP ended.

12th October = DH and I decided to start trying for a baby.

27th October = 12DPO according to fertility tracker, and got a BFP on a FRER (and on the days following took several more, just to check that it was real, haha!).

6th November = thought I was 5w1d, digital test said I was 4-5 weeks gone.

18th Novmber = still didn't have morning sickness. Took another digital test, and it said I was 5+ weeks gone.

11th November = first GP appointment, where she estimated my due date as 8th July based on LMP.

25th Novmber = first midwife appointment. She said the same (8th July), told me I was 7w6d, and referred me for a viability scan.

26th November = viability scan. Saw a heartbeat (yay!), but were told that baby was measuring 6w6d, rather than the 8 that I thought. 

I am stoked to have seen a heartbeat, but a little worried that bubba is measuring a week less than I calculated. My midwife said that I must have just ovulated later than I thought, but how could I have gotten a BFP so early if that was the case? 

Has anyone else been in a similar situation? What was the outcome? 

P.S. Sorry if this has same question has been asked a million times before- the search function didn't help me too much this time around! TIA! xxx

March2013FTM

It is absolutely possible that you ovulated later than you thought. Do you have regular periods every 28 days? If not, that could be why. Measuring a week behind isn't an issue quite yet. If you measure consistent at your next scan, that's all that matters. Try not to worry too much. A heart beat is a very, very reassuring sign. 

You'll make yourself crazy if you worry too much. I am going through something similar. If you go with the flow, you'll have less stress which is better for you and baby!

cMichelle0423

Unless you're charting and temping, there's no way to know when you ovulated, which means there's no way to know exactly how far along you are.

cMichelle0423

MommaChrissie27 said:

Hi ladies. I know it's a lot of reading, but here is a timeline of my current (somewhat anxiety-inducing) situation: 

30th September = LMP started.

4th October = LMP ended.

12th October = DH and I decided to start trying for a baby.

27th October = 12DPO according to fertility tracker, and got a BFP on a FRER (and on the days following took several more, just to check that it was real, haha!).

6th November = thought I was 5w1d, digital test said I was 4-5 weeks gone.

18th Novmber = still didn't have morning sickness. Took another digital test, and it said I was 5+ weeks gone.

11th November = first GP appointment, where she estimated my due date as 8th July based on LMP.

25th Novmber = first midwife appointment. She said the same (8th July), told me I was 7w6d, and referred me for a viability scan.

26th November = viability scan. Saw a heartbeat (yay!), but were told that baby was measuring 6w6d, rather than the 8 that I thought. 

I am stoked to have seen a heartbeat, but a little worried that bubba is measuring a week less than I calculated. My midwife said that I must have just ovulated later than I thought, but how could I have gotten a BFP so early if that was the case? 

Has anyone else been in a similar situation? What was the outcome? 

P.S. Sorry if this has same question has been asked a million times before- the search function didn't help me too much this time around! TIA! xxx

QFP

goldie987

First off ultrasounds are not the end-all-be-all that people think they are. I believe most doctors add a +/- 5 days to the estimated gestational age because variability exists which puts you right in the ball park for where you believe you are. Being off by a week happens, as long as baby is growing appropriately at the next scan, I wouldn't worry.

MommaChrissie27

Thank you, ladies! I know I need to just relax and then both myself and the baby will be better off! I guess the fact that I got a BFP so early on according to her dating threw me off.

@cMichelle0423 What is QFP? Sorry- not quite up to speed on all the acronyms! xxx

tgortney

You should be fine, my baby also measured almost a week behind and we heard a HB too.

At our 12 week scan, he was growing 4 days ahead.

I'm now 17 weeks with a healthy boy

Oh and just in case you're wondering, no morning sickness, food aversions, "common" pregnancy symptoms are normal. I've had none and my pregnancy is low risk and healthy.

Linsbins

Qfp is quite for posterity in case you dirty deleted.

MamaRoni

Lol I always thought QFP meant Quit freaking Posting

ashleyrobertson0113

I had something similar happen. Went in for my first ultrasound thinking I was around 7 weeks and was told I was only 5. Which means I got my BFP only 3 weeks after my LMP started. I was super confused on how that was possible that early. But all that really matters is that you're pregnant. Congratulations!

MommaChrissie27

@tgortney Thanks for sharing that! I have a lot more hope now! Also, thanks for clarifying what 'QFP' means! I don't even know how to delete, so I wouldn't anyway, haha! All the best for the remainder of your pregnancy! xxx

@ashleyrobertson0113 Thank you!! Same to you!  

purplefan1

My scan I thought I would be 6+5 based on the positive OPK and length of cycle. Initial scan put me at 5+6 (+/-4) but still made me nervous. And it wouldn't have meant that I got my positive pregnancy test 5 days after the positive OPK, which made no sense. Just hoping the little peanut is a couple of days ahead then what they think and I will get a positive surprise at one of my scans that I am further ahead in a week than I thought. :-)

MommaChrissie27

@maryworley1 I'm right in that boat with ya! If I ovulated as late as my dating scan indicates, that means that I got a BFP a few days after conception, which isn't possible... It's all a little baffling to me! I suppose until I have cramping/bleeding, or see that the HB has disappeared, I should just should up and be grateful! xxx

clairemwalker

This seems to be very common. Based on the dates they gave me at my viability scan, i ovulated about 3 days before my BFP! It made me worry a bit too, but at the followup scan 14 days later the embryo had progressed well for that time frame so there we go! I asked my midwife about the dates mix up and she couldnt really give me an answer either.

Kristin712

clairemwalker said:

This seems to be very common. Based on the dates they gave me at my viability scan, i ovulated about 3 days before my BFP! It made me worry a bit too, but at the followup scan 14 days later the embryo had progressed well for that time frame so there we go! I asked my midwife about the dates mix up and she couldnt really give me an answer either.

I think you're confused. You can't ovulate three days before your BFP. That's not medically possible.

clairemwalker

@Kristin712 i know its not medically possible, thats what i mean! I was in the same boat as PP's with being told that i must have ov'd much later then i thought, except that i got my bfp 10 days after when I thought i ov'd, so THEY were telling me that i must have ov'd later except i cant have otherwise it would have been negative, not positive. I asked my midwife and she couldnt give me a clear answer either, and i wasnt temping so i dont actually know when i ov'd, but i know its not when they think i did, or there is no way i would have got a positive. I think i ov'd on 21st june, and i got a clear BFP on 30th june. Based on dating scan they are telling me it must have been about a week later then i "thought" but then how was my bfp possible? Sorry if this post was long and confusing i just think i needed to explain myself a bit better lol

Kristin712

clairemwalker said:

@Kristin712 i know its not medically possible, thats what i mean! I was in the same boat as PP's with being told that i must have ov'd much later then i thought, except that i got my bfp 10 days after when I thought i ov'd, so THEY were telling me that i must have ov'd later except i cant have otherwise it would have been negative, not positive. I asked my midwife and she couldnt give me a clear answer either, and i wasnt temping so i dont actually know when i ov'd, but i know its not when they think i did, or there is no way i would have got a positive. I think i ov'd on 21st june, and i got a clear BFP on 30th june. Based on dating scan they are telling me it must have been about a week later then i "thought" but then how was my bfp possible? Sorry if this post was long and confusing i just think i needed to explain myself a bit better lol

Ahh gotcha. I didn't gather that from your original post.

clairemwalker

Yeah i get that it was a bit confusing! There seem to be alot of us out there who think we are 6-7 weeks along, only to go in to be told that we are only 5 or so weeks. I was trying to relate to the OP that It can be a little scary but as long as the pregnany "progresses" at a normal rate there doesnt seem to be anything to worry about.