Based on these dates and my utrasound gestational age, when would I have concieved?

[Lorna.Jones]

Ok, so, I am currently about 11 weeks and 4 days (just about) I am fairly certain this baby is with my current boyfriend now, and i wouldn’t even be investigating untill a friend joked that it could be man #1.
So, I had sex with man #1 on 23rd November 2012. I then quickly got with the boyfriend that I have now around about the 27th Novermber 2012. I had a strange 3–4 day light flow period, 5 days before my actual period was due, so that was the 8th December 2012, me and my boyfriend thought it was odd, so took a pregnancy test after the ‘period’ finished, and it was negative… between this and my next period me and my boyfriend had alot of sex.
Then…
My next period was due 5th January 2013, we took a test on Monday 7th January 2013 and it was possitive, we then had an ultrasound on Monday 21st January (2 weeks later) and the doctor said i was 5 weeks and 5 days. And the second ultrasound was the 13th February when i was 9 weeks and 3 days.
Does this point towards a pregnancy concieved at the very end of November, or in December?
I know this is alot to read and is quite complicated, but i really would appreciate some help, or even oppinions!
Thankyou very much in advance

 

[AvianasMommy]

Ok, so, I am currently about 11 weeks and 4 days (just about) I am fairly certain this baby is with my current boyfriend now, and i wouldn’t even be investigating untill a friend joked that it could be man #1.
So, I had sex with man #1 on 23rd November 2012. I then quickly got with the boyfriend that I have now around about the 27th Novermber 2012. I had a strange 3–4 day light flow period, 5 days before my actual period was due, so that was the 8th December 2012, me and my boyfriend thought it was odd, so took a pregnancy test after the ‘period’ finished, and it was negative… between this and my next period me and my boyfriend had alot of sex.
Then…
My next period was due 5th January 2013, we took a test on Monday 7th January 2013 and it was possitive, we then had an ultrasound on Monday 21st January (2 weeks later) and the doctor said i was 5 weeks and 5 days. And the second ultrasound was the 13th February when i was 9 weeks and 3 days.
Does this point towards a pregnancy concieved at the very end of November, or in December?
I know this is alot to read and is quite complicated, but i really would appreciate some help, or even oppinions!
Thankyou very much in advance

So I am in no way an expert or anything and could be totally off, but this is my best guess. I would think it is your current boyfriend's baby. Based on the your first u/s, I think you conceived late December. Again, don't take my word for it but if it were me, that's how I would be calculating it lol. Good luck .

 

[rmsh1]

Yep from my workings it is definitely a December conception, not November. Looks like you ovulated around Christmas time

 

[justhoping]

honestly i cant see how you can tell with only 4 days to separate them

 

[rmsh1]

Remember the first two weeks of gestational age are when your LMP was. You have not actually conceived in those first two weeks. So going by that working, conception itself was around December 25th, when ovulation would have occurred

 

[justhoping]

i really would like to know how any can really tell by 4 days apart? seriously.....??

 

[rmsh1]

I worked backwards from the scan dates, they are very similar. 21st Jan = 5 weeks 5 days, 13th Feb = 9 weeks 3 days. These dates quite clearly show there was no conception in November, so it doesn't matter about the 4 days between partners, Lorna did not conceive until mid to late December

 

[jensha]

i really would like to know how any can really tell by 4 days apart? seriously.....??

It's not 4 days apart. She didn't actually conceived on Nov 27 nor Nov 23.

OP, if you were 5 weeks and 5 days on Jan 21, it means you ovulated on December 26. That's your date of conception. So baby is definitely your current BF's.

 

[justhoping]

thanks for explaining it

 

[jensha]

You're welcome!