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Am I the father?

My ex and I had sex multiple times, but i didn't know she had a new boyfriend. After talking to her i found out she had her period Feb 13th and was with her bf during valentines weekend. We had sex from Feb. 17th thru Feb. 19th and she went to see him from the 20th-21st. We had sex multiple times from Feb 27th- March 7th. Im guessing she ovulates on a 28 day schedule.

She took a pregnancy test(clearblue) on March 29th that said she was 2-3 weeks pregnant and another on the 31st that said 3+ weeks. Also on the 31st her doctor said she was 6 1/2 weeks pregnant. 6 1/2 weeks is Feb 13 so she couldn't of been pregnant and had her period.

Im really confused an really hope someone can help me find out if it's mine or not. I still want to assist her as much as possible regardless of whether the child is mine.
Best Answer
134578 tn?1693250592
COMMUNITY LEADER
Hi, bamabob.  Welcome to DNA/Paternity, let's see what we can do to try to parse this out.

I appreciate that you would be there for your ex-girlfriend no matter what.  She should appreciate you, you have your values straight.

As MarLo says, when a doctor counts out the weeks of pregnancy, he begins on the first day of bleeding of the last period a woman had before she got pregnant.  For example, if a woman's period began January 1 and she ovulated and conceived on January 15 (this would be a normal gap of time between a period and ovulation if a woman has regular menstrual cycles), and it is January 28 and she goes to the doctor because her next period didn't come and he says she is pregnant, he is going to tell her she is 4 weeks gestational age (GA), or 4 weeks "along," or "in her 4th week," not the 2 weeks you might expect because of it being only two weeks since conception. The GA count, odd as it seems when you first hear it, is how all medical counts are calibrated.  

Doctors begin the count with the last period not because they think the woman got pregnant then -- they know she didn't, she was having a period!  But because back in the days before ultrasounds and early pregnancy tests, the ONLY clear place to begin the count was to start with a big, obvious signal like the first day of her last period.  So all pregnancy is counted that way even today.  That is why pregnancy, which takes 266 days from conception to full-term birth, is computed as being 280 days.  They add two weeks at the front end to move the beginning point to a computed first day of last period.

If you were to have said to your girlfriend's doctor, "6 1/2 weeks pregnant? Does that mean she conceived 6 1/2 weeks ago?" the doctor would have said, "No, about 4 1/2 weeks ago."  Given what he said about 6 1/2 weeks, this puts possible conception at around February 27 (depending on what 1/2 week means.  Usually they say a number of weeks and days, not a half week).  Which means you have a perfectly good chance to be the dad since you had sex from February 27 forward.  

However, that statement is only as accurate as how she got the "6 1/2 weeks pregnant" estimate.  If the doctor was merely counting forward from the first day of her last period by the calendar or a little cardboard wheel with dates printed on it, that is not anywhere as useful as having an early ultrasound.  If she has not had one, she should, right away.  Babies can vary from the average size as pregnancy progresses -- by the time she is full term an ultrasound has a margin for error of +/- three weeks if one were to try to use it for dating the pregnancy.  But in the early days of pregnancy, it can be spot on or only off by a few days.

In the 7th week (counted from the first day of last period), if an embryo is measured by ultrasound, the margin for error is only about a day.  Even in the 8th or 9th week, the margin for error is pretty small, a few days.  So if you move fast, you might be able to get a clearer answer about that ovulated-around-the-27th possibility.  Pay out of pocket if necessary, but get her an ultrasound very soon, and have her ask the tech for an estimated due date that is based only on the measurements and developmental indicators of the embryo.  If necessary, she could say that she is not sure when her last period was, or that her cycles are irregular, or she could just say she is trying to tell which of two boyfriends could be the father.  I don't know if home tests use the GA or not, I think they don't, but in any case, the window is now, you need an ultrasound and you need it as early as possible, not what some home test said and not a later ultrasound.

Regarding prenatal DNA testing for paternity, it is available, and non-invasive.  It is done by a blood draw from the mother (her arm) and swabs from the possible dad(s).  However, the field has drawn a large number of so-called labs that give unreliable results.  There are two labs with excellent reputations, Ravgen and the DDC, and they do top-quality work that comes at a high price.  (This has probably done a lot to attract the fakers into the field, the price is so high and they cut corners and rip people off.)  But if you are interested, and have $1700 to $2100 to spend, you can test with one of the best labs, they both have a network of labs who will draw the samples.  Sometimes people are better served by simply saving their money for the baby, but in some cases where more serious consequences hang on knowing, it can be the way to go.

Good luck, if she was sleeping ONLY with you from the 27th forward, you might be the only candidate for dad.  But if she was sleeping with you both in that time period (or even five days before -- don't forget, sperm can live up to 5 or 6 days in a woman's reproductive tract) then you have a chance but not the only chance.
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134578 tn?1693250592
COMMUNITY LEADER
Sounds promising, for sure.  Are you saying that she was not sleeping with her new boyfriend during that same time period?

It sounds like you have enough chance (if she was not also sleeping with him then) that you should do some thinking.  What do you want out of the situation?  A renewed relationship?  Or just to be a father?  You were so willing to be supportive that it should be relatively easy to work out the latter.
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Avatar universal
She had an ultrasound done today and found out the baby's new due date is November 23. I think it means Im the father!
Helpful - 0
Avatar universal
I must agree with all the other ladies, it's hard to say for sure as the sperm does live for a few days. In terms of the 6.5 weeks of pregnancy, keep in mind that doctors count from the 1st day of last period, ovulation usually occurs about 2 weeks after 1st day of period, so possible conception date could be around 2/26-3/2. Again, this is just a guesstimate, based on 2/13 as being the 1st day of last period. Hope this helps
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707563 tn?1626361905
Hi everyone -

We are not just an app. Anyone with access to the internet can access the pregnancy communities by going to www.medhelp.org.  You can see all of our communities here - http://www.medhelp.org/forums/list

Our pregnancy communities are not restricted to just pregnant women, or even just women. Please be welcoming.

Thanks,

Emily
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Avatar universal
There are a lot if men on this that come seeking advice and help just like we do so I think it's perfectly fine he's not being some creep trying to hit on you so it's no big deal

Secondly you should have a blood test done to be sure which is hard because if it's yours and your not there it could be bothersome if it's not yours and you are there would bother me because there's another guy there too it's out of you two just get the test to be sure good luck
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Avatar universal
Yep, I agree with the other ladies, there is no way to tell when she actually ovulated during that month and as sperm can live inside her for a few days. It's very close between you both. The only way you are going to find out is through a paternity test.
Helpful - 0
Avatar universal
First, there is nothing wrong with a man using this app/site, my husband does so he can be updated on how me and our son is doing. You're here asking for help and that's what this is for.

Second, I wish I could tell you the answer but I cannot. If there is a chance that it maybe your child then having a paternity test done. Not sure if the other man in this situation knows all that you do but maybe try talking to him as well. Hope you are able to figure things out and make the right choices if this child is yours.  
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Avatar universal
Also, there's something called implantation bleeding that she could have mistaken for her period. I did when I had it. So it might not have been her period.
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Avatar universal
Honestly, with how often and how frequent she had sex with the both of you (if she is for sure having sex with her current boyfriend.) You might not be able to exactly pinpoint. Witch means you'll have to do a DNA test. You can get them done during pregnancy. Or you can wait til the baby is born. But I would suggest finding out asap. Id hate to be in your shoes and go through the whole pregnancy with her and do everything you can, only to find out its not yours and her not want you involved anymore. I'm sorry this is going on and I hope you figure it out as soon as possible. Good luck.
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