How is a pregnancy dated

Discussion in 'First Trimester' started by katya12, Dec 11, 2011.

  1. katya12

    katya12 Member

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    #1 katya12, Dec 11, 2011
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  2. Jayjay027

    Jayjay027 Well-Known Member

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    Yes that's right. I'm exactly the same, 5+3 weeks and my last period was 1st Nov. So its dated from then.
    Depending on size of baby at your 12 week scan, u may be put forward or back :)

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  3. katya12

    katya12 Member

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    #3 katya12, Dec 11, 2011
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  4. kanga86

    kanga86 Well-Known Member

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    Scans really are funny things. I know exactly when I ov'ed but 3 scans have dated me as ovulating 3 days before as I was moved forward 3 days with my dates.

    Also sperm can live ofr up to 5 days so if u ov'ed 5 days after u last bd'd then u could be out on ur dates by a few dates. Taking ur last period as a way of dating ur pregnancy usually gets u closer to the right age of baby. xx
     
  5. katya12

    katya12 Member

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    #5 katya12, Dec 11, 2011
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  6. katya12

    katya12 Member

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    #6 katya12, Dec 11, 2011
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  7. Maria1977

    Maria1977 Well-Known Member

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    Another factor is that sperm lives up to 72 hours I think, so you might have conceived a day or so after having sex.

    When you have your 12 week scan they are pretty accurate at dating, but it may be a day or 2 out either way, but I wouldn't have thought it would be a week out either way.

    But when you have a 20 week scan they would know by then if you are bang-on for dates or not, usually you are from the 12 week scan!
     
  8. katya12

    katya12 Member

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    #8 katya12, Dec 11, 2011
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  9. SmallPurpleCat

    SmallPurpleCat Well-Known Member

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    Now I'm confused... My last period started also started on 1st Nov so I am 5+5...not 5+3...?
     
  10. kanga86

    kanga86 Well-Known Member

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    the scan date of 5 weeks estimate is from ur last period date not from possible ovulation. It is possible u are any date between 5-6 weeks but they can't be too accurate at that stage as the usually date u by measuring the baby's size. A baby is only visible from about 6 weeks soi wouldn't worr to much about ur dates yet.

    Are u booked in for another scan? Xx
     
  11. katya12

    katya12 Member

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    #11 katya12, Dec 11, 2011
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  12. misscrazycooki

    misscrazycooki Well-Known Member

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    once egg is fertilised it can implant several days later and thats why your dates may be out.

    Sadly to the original poster I suggest getting a DNA done once baby is born, as there is no set way of determining the babys father just by dates. There has been other threads on this and the only answer us other ladies could give was a DNA.

    Hence why there are so many on jeremy kyle lol >.<
     
  13. kellymummytobe

    kellymummytobe Well-Known Member

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    I would wait till your next scan hunni then they will date you correctly like you said on the other thread that they could only make out a sac if it was 2nd of oct surely there would be alot more on the scan Hun I would wait :) xx


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  14. kanga86

    kanga86 Well-Known Member

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    I wouldn't have thought so, as u mentioned u had a heavy period from the 1st nov. so any bd'ing before this won't count for ur pregnancy. Xx
     
  15. Maria1977

    Maria1977 Well-Known Member

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    Although 2 Oct is too long ago to be only 5 weeks gone. I did have a normal period after I conceived my son. I conceived him 1 week before my last period. I found out at my dating scan xx
     
  16. michellewatt19

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    my periods ,well first day of periods was the 30 october,so would that make me near 6 weeks,in that terms,i think i conceived around 16th novemeber,as my man wasnt home till then as works away..midwife on tuesday ,aint sure what she is gonna do?maybe bloods i dont know,anyone no?

    i love being pregnant and knowing that you have a growing baby inside you who you love dearly..such a wonderful thing.
     

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