If her due date is July 3, she got pregnant somewhere around Oct. 11
Wait! Just found out. Due date is July 3
If you had sex with her, then she had her period, and then she had sex with another guy the possibility that this baby belongs to you is almost 0.The only way it could be is if she did get pregnant by you and was spotting and thought it was her period. Some women can bleed the first month or two of their pregnancy.
You have to find out when she got pregnant and when her due date is. This will tell you for sure who the baby's father is. If she got pregnant around the end of Sept then the baby can't be yours because you were out of town.
Have you asked when her due date is and have you asked to see her first ultrasound? The ultrasound will say how many weeks she was at the time. Remember that they always add 2 weeks because they go from the first day of her last period. So, a woman is usually 2 weeks less pregnant than what the ultrasound says.
I recommend you go to her next Drs appointment and ask the Dr when she got pregnant and explain that she did have her period after you two were together and ask if there's any possibility that this baby could be yours. If the dates are way off then you're not the father. If they're too close to tell for sure then you'll need a DNA test when the baby is born.
Thanks for the feed back. I don't know the due date, I am ready to father MY child but not some dudes that she cheated on me with. The only one telling me it's mine is her. Thanks for responding, it's very reassuring.
It sounds like she might be in denial about who this baby belongs to. She was not pregnant after the two of you slept together, she has sex with another man after you left and then she got pregnant. It's obvious that this baby is not yours and you have no responsibilities as far as taking care of her or buying anything for the baby. The real father is the one who has the responsibilities to this baby.
I would like to give you some advice because this baby could have very well been yours. Don't believe any girl if they tell you they're using birth control. Not unless you've been in a long term relationship or you're married. Are you ready to be a father and settle down? If not, then protect yourself and always use a condom,every single time you're with someone. There's no reason to ever have an unplanned pregnancy when there are so many different kinds of birth control available.
Are you saying you still want to be with her even though the baby is not yours? That's your choice of course but the dates are accurate and there is no way you're the father.
Do you know her estimated due date? If she got pregnant between Sept. 7-9, her due date would be around June 1.
But in general, no, if you had sex with a girl 20 weeks ago and she's now 16 weeks pregnant, you're not the dad, because she would have gotten pregnant 14 weeks ago, so there's a 6 week difference in when you had sex and when she got pregnant.
Because you start counting a pregnancy from the first day of the prior normal period, your girlfriend got pregnant 14 weeks before the sonographer said she was 16 weeks pregnant.