Question: Please help. If you are 35 weeks pregnant and the doctor says its growing slow but nothing to worry about and the weight of the fetus is 2470 grams, does this mean that the due date could be out by a week and you are 34 weeks pregnant?

Basically, my boyfriend and I found out a girl he was seeing before me is pregnant, I am devastated!!! She doesn't now who the father is. My boyfriend last slept with her on the 2nd of February and she also slept with another guy on the 26th of February.

Her due date from the scan is November 13th putting her LMP on the 6th of February. However, my boyfriend told me she took norethisterone to delay her period a few days before the 6th of February. She then came on her period the 12th of February till the at least the 17th after stopping this pill. My boyfriend knows this because the next and last time he saw her was the 15th of February and they didn't sleep together because she was on her period. I have worked out that if she has conceived from my boyfriend then she would be full term now and not due on the 13th. Also she delayed her period and therefore her cycle shifted, putting this other guy in the middle of fertility. Am I right? Also does the weight of the baby show this? I know its difficult to tell as babies grow differently, but she has been told that she is growing slightly slow but no cause for concern. If it were this other guys, her due date would be the 19th of November, which is only a few days out from the original due date.

Please help me and offer advice, I am really finding this hard to deal with and I dont want another woman to have my boyfriends child.

Hello so the boy of the 26th of February is most likely to be the father? She only slept with my boyfriend on the 2nd and him on the 26th. She delayed her period by a week with Norethisterone 5mg so that means her cycle of 28 days (she is regular because she knew when she was going to come on around February 6th because she last had a period on the 9th of January and has a 28 day cycle). Does this mean her ovulation shifted along with the first day of her LMP?

Why does the dating scan say her last menstrual period was the 6th of February, when she had it on the 12th of February? Im really confused.

Ok I understand that thanks but where does this other guy fit in? Is it most likely his?

Thanks, he definately didn't because he met me on the 16th of February and didn't want to see her again. So it's possible she ovulated later in the month on the 26th?