My daughter had intercourse on the may 31st and June 1st she also had intercourse the 10th she started her period June 11 and had intercourse June 13th she went to the doctor on July 22 found out by ultrasound she was about 5 to 5 1/2 weeks pregnant so we are trying to figure out when most likely she conceived and from which time of having intercourse

If I knew her due date I could help you more. If you are concerned about paternity a test will still have to be taken after the baby is born.

Due dates are good estimated dates of birth. They are taken from the info supplied, from ultra sounds and more.

They can easily be off a week or more. So there is no way to tell which date. And it really does not matter unless she had different sex partners. But you did not ask that.

If you were asking that, the answer would be that she has to wait for a DNA test.

She had two different partners she had to go to the doctor today for bleeding they said her cervix is closed and her numbers were doubled and they put her numbers at 24,000 they said around 7 weeks the wheel said 6 weeks I know she prob needs a dna test but her due date is march 16 2012 I have heard you ovulate 2 weeks before and after your period if that's the case she was with her boyfriend 28 of may through June 1 she slept with her friend the 10th and started her period later that morning she was on her period through 13 th which is the day she slept with her boyfriend again we did an online ovulation prediction it said she ovulated from around June 22 through 27 she slept with her boyfriend again the 25th

Inguess what I really want to know is why do they use the first day of your last period to determine the due date or how far along you are according to the wheel she was 6 weeks pregnant and the ultra sound didn't show no pulse a sac

Unless she was TRACKING her ovulation, there's no way to know when she conceived for sure.

She needs to confess to BOTH guys that she doesn't know who the father is, and wait until after the birth for a DNA test.