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Pregnancy

Talk about every stage of pregnancy, from early symptoms to preparing for birth.

Original poster

Wrong Due date?

305 replies

Deanna9 · 03/06/2018 10:20

I have a question about my due date, I and my partner think it's wrong going on what we know about ovulation.

Period on the 30th Sept 17- 3rd Oct 17

Sex on the 6 oct 17

Sex on the 20th oct 17

Period on the 21st oct 17- 23rd Oct 17

This makes conception after the 20th impossible so how is my due date the 6th sug 18.

Ive not had sex at all since the 20th of October so I know I can't have gotten pregnant after that.

OP posts:
AuntieStella · 04/06/2018 08:23

Whatever the situation your baby measured 12 weeks at your 12 week scan and 20 weeks at your 20 weeks scan

The earlier scans are more reliable than the later Ines, as growth rate in the early weeks is more to do with structures being formed (which happens in the same order and taking the same time) rather than the later ones, as just growth once rules formed is much more variable.

Your MW booked you for your 12 week scan accurately as it took place in your 12th week. She win't have chosen a date at random. You must have said something else to her - can you remember what that was?

LisaSimpsonsbff · 04/06/2018 08:27

Your MW booked you for your 12 week scan accurately as it took place in your 12th week. She win't have chosen a date at random. You must have said something else to her - can you remember what that was?

I think this is actually now clear now she's mentioned her early scans - the midwife knew when to book the scan for 12 weeks because the OP had just had a scan measuring her at 7 weeks (she says scan and booking in were same day) so she didn't have a pregnancy of unknown date any more - she had a pregnancy where the date was known to within a few days. So of course the midwife knew when to book the 12 week scan for.

ForEverlong · 04/06/2018 08:30

Ignoring all your period and sex dates for a second.

You’re saying you had;

  • A positive test on the 10th November
  • A scan on the 6 December that dated you at around 5 weeks. If you’d been 3/4 weeks ish pregnant on the 10th November this scan should have dated you between 6 and 7 weeks.
  • a scan on the 20 December that dated you at 7+3. If you’d been 3/4 weeks ish pregnant on the 10th November this scan should have dated you between 8 and 9 weeks.
  • a scan on the 26th Jan that dated you at 12+4. If you’d been 3/4 ish week pregnant on the 10th November this scan would have dated you between 14 and 15 weeks

Can you not see that the scans are all suggesting the same thing. Consistently they’ve shown the same dates. Your conception date must be different to what you think

Most probable conception dates: Nov 7, 2017 - Nov 11, 2017
Most probable dates of sexual intercourse that led to the pregnancy: Nov 5, 2017 - Nov 11, 2017

Possible conception dates: Nov 6, 2017 - Nov 16, 2017
Possible dates of sexual intercourse that led to the pregnancy: Nov 2, 2017 - Nov 16, 2017

Also - 3 weeks exactly from the 21st October is the 11th November. You tested before your period was due, not when it was late or the date it was due like you said. I think you may be getting all your dates muddled even on your calendar

Rachie1973 · 04/06/2018 08:35

ZibbidooZibbidooZibbidoo
Has anyone gone 44 weeks pregnant? I’ve never heard of it.

Not here lol, but I did 3 x 42 week pregnancies and a 43 weeker. I think I just take longer to get there :) the first 3 were induced at the 42 week mark, the 4th I was allowed to go longer but I had to check movements all the time, and I had a rented doppler.

Our hospital does 'management of overdue pregnancy now' for those trying to avoid induction, which is new from when I had mine!

OP, in the kindest possible way I think you need to learn some basics a little, and relax a bit. All the scans seem to match and you're being checked regularly, all seems well.

AuntieStella · 04/06/2018 08:39

Sorry - I missed the 7 week scan.

That means that there are 3 scans (7, 12, 20 weeks) all agreeing on dates. OP said first scan was emergency, because of cramps - not routine or part of booking. She has previously said that she gave MW her LMP dates and was given scan date (earlier in the thread, when only 12 and 20 week scans had been mentioned).

The one point of consistency in the varying accounts is, as said by LisaSimpsonsbff that all scans agreed: "every single scan date - performed by multiple different medical professionals - agrees, so the error is far more likely to be yours than theirs"

AnotherOriginalUsername · 04/06/2018 08:43

OP - you're what, 32 weeks pregnant. Why are you only questioning this now? What's prompted it?

Cosmoa · 04/06/2018 08:45

Hey OP... My first due date was April 30th and after my scan they said I was actually due on May 21st. Didn't make sense to me at all!

Turns out the sperm was asleep in me for like 12 days or something ridiculous so I actually got pregnant over a week after I had sex. Biology isn't that straight forward
..

Does this help?

Cosmoa · 04/06/2018 08:49

Sperm lives 5 days max so till the 25th Nov so it not only survived the max days, it's also managed to survive me bleeding for 3 days

This isn't true! Like I said above.. I had sex on the forth but got pregnant on like the 12th or something.. I'm still confused by it myself but I was assured it was just a 'sleeper sperm' or something like that...

I asked them to double check my dates at the next scan but they said it was all correct.

And you can measure 2cm above and below without them batting an eyelid.

LisaSimpsonsbff · 04/06/2018 08:55

This isn't true! Like I said above.. I had sex on the forth but got pregnant on like the 12th or something.. I'm still confused by it myself but I was assured it was just a 'sleeper sperm' or something like that...

In your case it could also be the margin of error in the scans due to the different rates fetuses grow at and the margin of error in measuring - no one's saying that scans always pinpoint it perfectly to the day (I am certain that my due date is four days off from how it would be calculated from when I really ovulated; I know someone with an IVF pregnancy, so no room for uncertainty about conception at all, who was measured six days off) but they are never off by as much as OP thinks they would have had to be. The standard margin of error at 12 weeks is +-7 days.

ZibbidooZibbidooZibbidoo · 04/06/2018 09:06

Yes I know a few women who went 42+ weeks but I haven’t met anyone who went 44+

ZibbidooZibbidooZibbidoo · 04/06/2018 09:09

Turns out the sperm was asleep in me for like 12 days or something ridiculous

Like I said above.. I had sex on the forth but got pregnant on like the 12th or something.

Which is it? 12 days or 8 days?

CheesecakeAddict · 04/06/2018 09:20

Sperm can live in your body for up to 7 days. If you released an egg shortly after your last period, having had sex the day before, it could be possible you conceived then

ShowOfHands · 04/06/2018 09:48

Cosmos, scan measurements have a margin of error of 5-7 days and implantation takes a different amount of time for different women so even if you know exactly when you had sex or when you ovulated, you can't know how quickly the embryo implanted and you have to allow for a margin of error on the scan. The sperm wasn't in you for 12 days I'd imagine but yes it's perfectly possible it hung around for several days.

Deanna, pregnancy is dated from when your body sheds the lining from its previous cycle and begins to prepare for a fertilised egg. Those first 2 weeks are your body doing its prep before sperm meets egg. Before we had scans and a better knowledge of biology, we would have just accepted that pregnancy takes roughly 40 weeks from our last external sign of being pregnant ie last menstrual period. We've simply stuck with this as a way of measuring and when medical professionals refer to any gestation, they include these two weeks. So when we say a baby is full term is 37 weeks, we mean 35 weeks from conception technically but we don't describe it that way. Regardless, youve had six scans and many professionals confirm dates. You have made a mistake somewhere. You didnt seem to question it until now and only you can know why that is.

MinsPei · 04/06/2018 09:48

Sorry to keep going on about this, but at first you said you tested because you were a week late and then when called up on it you 'remembered' that you hadn't been a week late after all, merely a couple of hours and tested because you were curious. I think there's more to this than you're letting on and I don't think this thread will give you the answer you want. Best of luck with the rest of the pregnancy though.

ZibbidooZibbidooZibbidoo · 04/06/2018 09:55

I suspect OP has cheated on her fiancé who is a bit more savvy about conception and due dates than she thought and is trying to get together a viable reason to explain the later due date.

Original poster
Deanna9 · 04/06/2018 09:57

People on this post are the one saying that a gestational age is 2 weeks more than the baby's conception age.

Making 7 weeks gestation, 5 weeks since conception, I don't see how that's possible when my baby had a very visible heart beat then and we where told if she was less developed than the 7 weeks we wouldn't see a heart beat.

She can't be 7 weeks developed on that scan if she was only conceived 5 weeks before that especially if all babies grow exactly the same before 12 weeks which is what we where told my numerous midwifes and doctors

OP posts:
ZibbidooZibbidooZibbidoo · 04/06/2018 09:58

You’re an idiot.

ZibbidooZibbidooZibbidoo · 04/06/2018 09:59

I can’t believe you still don’t understand this. Have someone else make up your baby’s bottles when it’s born.

Original poster
Deanna9 · 04/06/2018 10:05

Considering my fiancé agrees with my dates and agrees with where We think my due date should be I really don't think he thinks I'm cheating on him. And we both wrote it down on the same day.

Yes I got my testing date wrong by a day/hours but I was still pregnant on that day either way.

I'm questioning now Again not for the first time, not my fault my midwife doesn't explain things properly. Nd that when asked if that dates from conception that sonographers say yes instead of explaining that it's not. No I didn't ask the sonographer this pregnancy but I did when I got pregnant with my first because I'd not had a period in a while then

OP posts:
LisaSimpsonsbff · 04/06/2018 10:05

Making 7 weeks gestation, 5 weeks since conception, I don't see how that's possible when my baby had a very visible heart beat then and we where told if she was less developed than the 7 weeks we wouldn't see a heart beat.

I honestly can't work out if you're a very annoying troll, but on off-chance you aren't: when they said seven weeks they meant 'a fetus that is five weeks since conception'. Because that's always, always what they mean. So at 5 weeks post conception - 7 gestational weeks - you can see at heartbeat. Just as happened at your scan. Because you were seven sodding weeks pregnant!

Waitingonasmiley42 · 04/06/2018 10:07

Do you have any additional needs or learning difficulties? This is absolutely not a dig at all and we are all different with different needs/abilities. It's been explained numerous times to you and you just aren't getting it. The scan on 20th Dec where baby had heartbeat is a completely normal time for a heartbeat to be seen. The baby was 7 weeks old because pregnancy is dated from the first day of your last period. Yes, by the way you personally count pregnancy by disregarding those 2 weeks then it was only 5 weeks. HOWEVER NO ONE ELSE COUNTS PREGNANCY LIKE THAT, so the baby was 7 weeks and had a heartbeat.

SamanthaH92 · 04/06/2018 10:08

They date it from the day of your last period. I am 33 weeks on tuesday and due July the 24th. They won't have your dates wrong if you have had 3 scans, although there is some margins of error. I'd go with what the professionals say. You must of had sex later.

ZibbidooZibbidooZibbidoo · 04/06/2018 10:09

not my fault my midwife doesn't explain things properly.

Based on your failure to grasp it despite numerous explanations on this thread I suspect she did explain it properly.

Rachie1973 · 04/06/2018 10:09

Deanna9
People on this post are the one saying that a gestational age is 2 weeks more than the baby's conception age.

No, not people on this post. People everywhere, That's how it's worked out. Always

Rachie1973 · 04/06/2018 10:10

LisaSimpsonsbff.

Because you were seven sodding weeks pregnant!

This. Over and over and over again