Who's the father?

[blo98]

Basically, the first day of my last period was the 21st April. I was having sex with my boyfriend very regularly before and after my 6 day period.
However, on the 2nd/3rd of May we had an argument and I went out and met someone else. I am no where near proud of that! But the sex only lasted about 2 minutes and he didn't even orgasm inside of me, but I am worried about the 'pre-***'.
When I found out I was pregnant it never even entered my head that my current boyfriend wouldn't be the father, but now I'm just over worrying and need some clarification.

[Lollypop4516]

What was the due date you were given from the ultrasound and how many weeks were you at your first ultrasound?

[blo98]

The due date I was given was the 20th January. But that doesn't add up with the period I had.
I thought I was 12 weeks at my first ultrasound... Both according to the EDD I was a bit further along?

[AnnieBrooke]

Hi, blo98, just so you know, it is possible to get a prenatal DNA test that has no risk to the baby.  Ravgen and the DDC do a test that is run on a blood sample from you (taken from your arm) and a swab or blood sample from the possible dads.  The only down side is that it is about ten times as expensive as a DNA test done after the baby is born.  If you do one, test with both guys, so you will get a definite answer.  As Lolly says, you can't do this assessment with your dates alone, they don't rule out either guy if your first ultrasound was that late.  The possible margin for error gets wider throughout the pregnancy and it already covers both guy's dates.

[Lollypop4516]

Due to the fact you have had sex more times with your partner I would say it favors him, but that's purely based on chance. Your dates do not rule either guy out. X

[Lollypop4516]

How much further along did they say? Ultrasound are more accurate than period dates? If you can give me that information I will try and help you

[Lollypop4516]

A due date of the 20th Jan 2017 gives you a conception date of the 29th April, at 12 weeks this has a error rate of -/+ 7 days so I don't think you can ever be 100% with your dates. I would try and get a DNA you can do one before the baby is born but it comes with a risk.

[blo98]

They didn't say how much further along.
From my dates I would have been 12 + 6, but according to their dates it's 13 + 5?

[Lollypop4516]

At 13w 5days most doctors would say the error rate is -/+ 8 days I would look at 10 days to be be sure. I don't think you can be sure with your dates.

[blo98]

Who do you reckon the more probably father is though?