Pregnancy 18-24 Community
are conception dates accurate?
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are conception dates accurate?

hi, i slept with someone one the 17th dec. then i slept with my new partner on the 20th through out,i had a period on the 27th i got pregnant, they said my conception date was the 30th december, what are the chances of it being the lad from the 17th? pleasee help!!!
31 Comments Post a Comment
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1955408_tn?1328062054
You would definitely need a DNA test. Conception dates and dating scans can be off by a few days, so there's really no way to know for sure.
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134578_tn?1404951303
If it was a normal period, probably what they said is that your gestation date is 30 December, meaning that your conception date was around the second week of January.  The chance of it being the first guy's baby sounds pretty slim even if they did say December 30 was your conception date, sperm doesn't last two weeks in your system.
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Avatar_n_tn
They didn't say conception date come to think of it, they just said I was 10 weeks 3 days, and I worked it back to 30th december, everyones sayin you can't get pregnant on your period, proper confused! What's a gestation date? X
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1955408_tn?1328062054
What's your due date?

It's rare, but it IS possible to get pregnant while on your period.
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Avatar_n_tn
Really? I had sex from 20th but also before the 17th, I had a 4 day period I think,so if I had sex on 20th up till my period, I could have got pregnant? :/
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Avatar_n_tn
Due dates 5th october x
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2042970_tn?1349105255
i conceived 20th december due 11 sept i think your dates might be a little wrong. My dates are normal so how your 1 month later than me but conveived only 10 days later is beyond me. Hope that helps x
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134578_tn?1404951303
All medical counting of pregnancy is done from the first day of the last period, because that is usually a known date with a visible signal (the starting of bleeding).  This is true even though of course every doctor would tell you that on the first day of your last period, you were having a period, you weren't pregnant yet.  They count from that point (day 1 of bleeding is the first day of the count) and assume you conceive at about day 14, 15 or 16, by that count.  Even ultrasounds use this kind of count.  An ultrasonographer who says "You look to be 10 weeks 3 days pregnant" is saying you're about 8 weeks 3 days since conception.
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1955408_tn?1328062054
Are you sure you didn't have sex after your period. A first trimester ultrasound can be off, but it wouldn't be off by two weeks.
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2006603_tn?1331332927
I got pregnant while on my period. so its possible. I think it was meant for me to have a baby tho, I was on my period, birth control and used a condom and im 27weeks now lol.

All we can do is guess who the dad is, only a DNA test will tell you for sure, if I had to guess id say the second guy.
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Avatar_f_tn
Your conception date should be sometime @the beginning of jan....
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Avatar_f_tn
Im due a few weeks after u & i got pregnant towards the end of jan. My cycle.hn is irregular so i didnt have a period in jan..but that when i conceived
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Avatar_f_tn
Sounds like u,had sex in jan also
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1756475_tn?1330542313
Oct 5th... great day to be due! thats my birthday.  it actually puts your conception date around New years eve... I always hear about that lovely fact from my parents.  I know how they celebrated new years that year.  
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Avatar_f_tn
DNA test to be sure.
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Avatar_f_tn
Wow Sadies!! A period birth control and a condom???  That is amazing! If that is not a miracle then I don't know what is.  Congratulations!!
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Avatar_n_tn
They go by pregnancy weeks not normal weeks,and yes I had sex after my period but though because they said my conception date was then I didn't they could be later then they said, how come only 8 weeks 3 days and not 10 weeks 3 days I'm confused :/ and yes I had sex in january aswell,
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Avatar_f_tn
Yea u got pregnant in jan...
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1955408_tn?1328062054
You got pregnant in January. These are your dates according to the due date they gave you.

First Day of Last Menstrual Period:  *December 30, 2011*
Probable Date of Ovulation: * January 13, 2012*
Possible Dates of Conception: * January 9 to January 17, 2012*
Due Date: * October 5, 2012* (40 weeks)

So whoever you had sex with in January is the father of the baby.

They're saying you would have been 8 weeks 3 days at conception because doctors go by your last period and not conception. So 2 of those 10 weeks you weren't actually pregnant, but since they cannot definitely tell you a conception day they use your last period.
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Avatar_n_tn
Do you think? I hope so, I really so,I don't think can be off ny 2 weeks, maybe a few days but not weeks x
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Avatar_f_tn
Jan for sure:) congrats also
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1955408_tn?1328062054
It's definitely whoever you had sex with in January. There's no way the ultrasound would be off by that much.
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Avatar_n_tn
Thank you everyone, you have been a great help :) and thank you, can't wait for my next scan now :) x
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1712422_tn?1407308655
I conceived January 13/14 and due date is oct 5/6 so I think your dates are wrong
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1712422_tn?1407308655
But I am almost 17 weeks not 10 weeks
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Avatar_n_tn
I'm now 16 3 days, I had my scan on 10 weeks 3 dayd & they said I was due 5th october so counted back at it worked out 30th dec x
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1712422_tn?1407308655
Then your conception date is definitely January 13th!!!
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1712422_tn?1407308655
December 30 was your first day of your lmp, you didn't ovulate until January.

Gestationally we are only in our 14-15th week. You conceived in January so whoever you had sex with in January would be the baby's father :)

Congrats!!
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2095738_tn?1339828843
I'm due Oct 9th and had my period jan 2-7. They said I conceived jan 17th, but I haven't had sex months before or since the 16th(late at night) so one day isn't very far off. You are only due a few days before me so I'm gna say the pregnancy came from January's fun.
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4224533_tn?1351316282
My last period was around the 22nd 24th of March 2012. Meaning my due date is  December 27 or 30. Now I go to the doctor at 7 weeks they tell me my due date is January 11th.???? but if that is so I would of had to have my last period the beginning of April, which I didn't. I had no period at the end of the month which is when I always came on. around my 20 week ultrasound they say my baby measures a little small. So if my baby measures small it will make it as though my due date would be Jan right??? So I'm going to go off my last period and keep my due date at the end of December right??
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Avatar_m_tn
Well maybe ..I mean ..I know this is a bit crazy..but just maybe you should use protection if your going to sleep around..I mean really letting men ejaculate in you that you have no intention on being with long term is pretty shameful..it's your mess figure it out! Next time keep your legs closed or put that rubber thing on called a condom
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