they use the first day of your last period because it is almost impossible to get a due date based off of date of conception because every woman's body is different and we don't all ovulate on the same day of our cycle. that is why it is called an ESTIMATED due date. they get a more accurate due date when you have your first ultrasound done based off of the size of your baby.

you didnt get a may period because you were already pregnant before you had sex on may 20th. it takes almost 2 weeks after the egg is fertilized before any traces of pregnancy hormone will show up in a woman's body and be detected on a pregnancy test.

if your last period was april 20th, your date of conception was probably somewhere around may 4th (if you have a 28 day cycle). you didnt 'come up pregnant 4 days later', you were already pregnant for 2 before you had sex on the 20th.

OK so what if you dont have a 28 day cycle same rule applies was pregnant before May 20th? so the test cam up positive in 4/5 days i though myself it was a lil fast. check out all my other post and you can get a feel for whats going on? its a mess

most women ovulate halfway between periods (so if she has a 30 day schedule, she would ovulate on day 15 instead of day 14 if she has a 28 day schedule). other women ovulate 14 days before their next period is expected. a woman can only become pregnant the day before she ovulates, the day she ovulates, and the day after she ovulates. the egg generally 'bounces around' inside the uterus for 2 weeks before she gets her period. so... if a pregnancy test came up positive 4 days after having intercourse, then the pregnancy was already there before that sex happened. it is very rare that a false positive pregnancy test happens.

i did read your other posts yesterday. i find the situation to be quite odd. if the girl is pregnant and you only had sex with her on may 20th or whatever.. then it is obviously not yours. and if she tries to say it is, all you have to do is take a dna test when the baby is born.

as for the girl not showing you proof of the pregnancy, i would just walk away if you have no emotional commitment to this woman. its obviously not your child and shes obviously messing with your head. if you see her in 5 months and she has a bump for a belly, then you know she wasnt lying. but it is impossible for a pregnancy test to come up positive 4-5 days after sex. after the egg is fertilized it still takes a couple days before it even burrows into the uterine wall. the earliest you can test for pregnancy is 5 days before your missed period... and the % for a positive result (if you are pregnant) is below 50%. so even 9 days after conception most pregnancy tests can pick up the pregnancy hormone.

what exactly is this womans intention? is she trying to trap you or has she made is obvious she doesnt want you to be around her or the baby?? i think shes just scared cuz she made a mistake at the beginning of may and doesnt want to believe who the father of the baby could be so shes hoping its you. i dont really know though. but you should seriously sit the girl down and find out whats going on in her head and find out what role she wants you to play in this situation. if shes trying to tell you its your baby and she wants child support and all that crap, tell her you want a dna test when the baby is born. you wont sign any papers and have any obligation to the child until you know for a fact that it is yours. good luck.

sorry... the last sentence of the 2nd to last paragraph should be ""..so even 9 days after conception most pregnancy tests CAN'T pick up the pregnancy hormone"

Thank you i feel the same way and i forgot to say this is overseas not in the states and i dont talk or see her anymore i told her no proof then leave me alone.Its been 2days. But I dont understand all the things she has said about the sickness.about support at first she says no then after she claim she went to the docotor and they said they are twins. then she is talking about now i will need your support and this that. I said well i need to see what you did and i want a copy send me something. she claim she took a test and email it to me but i never got a email. she has been emailing me before all this and now it doesnt work. When i told her you dont get pregnant in 4 -5 days she could only say whatever.I told her all the bleeding and pains and not taking care of herself so i am just going to let time go by and see what happens

Today she is still saying she is having the kids but she claims the her fone didnt let her send out any email.it like now she is telling me sorry for messing up and this and that but she says she feels guilt but she is still having twins she says.

By the way from the pics i saw today she is looseing weight witch is highly strange.

Ok i got a pic of the test can i share it with you

OK so how possilbe is it to see twins show up. she says she seen them in a month they used some kind of rod in her vagain and something on her stomach. I didnt know you can see twins in 1 month

Twins is no different then seeing 2 eggs in the uterus. You can see twins as early as a month as long as she got an ultrasound done.

she didnt say it was a ultra sound she just said some kind of rod.I am not sure what it is called.this is. But she is sure she got a positive test in 4-5 days so she is sure she dont believe anything i have told her so i got to do a DNA test.

there was no ultra sound done yet

Ok she says she knows when she got pregnant.

She said she goes by the day she had sex not the day of but the a few days before then count up 9 months. So she took May 20 and counted 9 months from there. She knows when she got pregant. ok in that short term where was the fertilazation?

I think she means is this, If your last period was april 20-21 you add 7 days the subtract 3 months. so would make it sometime in january. does that sounds right. She is the first one that i know that know when she got pregnant.with out a ultrasound.

If the first day of her last period was between the 20th and 21st of April that would make you correct, late January. Most likely she was already pregnant before you and her had intercourse in May. I would request a DNA test either while she is pregnant or as soon as the baby is born. It is unlikely she got pregnant right around when she was due for her period, unless she has a very strange cycle.

Thank you for the update she says it comes on that time every month Do you have a way to accept messages ??

Unless she its telling the truth about her last cycle.She may not even had a period in April. I have been busy sorry i have got back with you all. But I am agreeing with chrisssee it dont seem like the test came up positive that fast unless it was there already. If she took some kind of test where they used a rod and she was able to see inside of her.Dont you think they could have gave her a due date?