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Are ultrasound conception dates accurate?
I discovered I was pregnant unexpectedly, and went to have an ultrasound on May 23rd. Due to having wavering periods, I never really keep track, and therefore I don't know when my last period was. I can give an "estimate" but I really don't know because I never keep track. (Plus I have always been told that because of metabolic issues, and PCOS that it would be very hard for me to get pregnant).
Anyway, not exactly proud of this, but I was with 2 different men in a two week time period. One I didn't use protection with on Saturday April 7th (we have been very good friends for years, and it just happened on a night out drinking/dancing) and the other man I only went out with a few times, and when we slept together the following week (on Saturday April 14th), the condom broke. I didn't think anything of it, because I am almost 38, and this has never happened to me before.
So, my question is, when I went to have my ultrasound, the sonographer did 2 measurements for the conception date: one was 6 weeks and 3 days, and the other one (just to be sure) was 6 weeks 5 days. So, we split the difference and said 6 weeks 4 days. This would make my conception date April 7th, which is the exact night I was with the first man.
Do you think there's a big chance that the 2nd man could potentially be the father? I am hoping the first man is indeed the father, because we have been friends for years, and it would be alot easier to handle. The second man, however, I don't even speak to anymore. I would hate for it to be the second man.
Any advice on people that have gone through this? I guess I just want some confirmation that these ultrasound dates are accurate. The ultrasound tech was amazing, and I feel like she really knew what she was doing, but I just want to make sure that these results couldn't be a whole 7-8 days off.
Anyway, not exactly proud of this, but I was with 2 different men in a two week time period. One I didn't use protection with on Saturday April 7th (we have been very good friends for years, and it just happened on a night out drinking/dancing) and the other man I only went out with a few times, and when we slept together the following week (on Saturday April 14th), the condom broke. I didn't think anything of it, because I am almost 38, and this has never happened to me before.
So, my question is, when I went to have my ultrasound, the sonographer did 2 measurements for the conception date: one was 6 weeks and 3 days, and the other one (just to be sure) was 6 weeks 5 days. So, we split the difference and said 6 weeks 4 days. This would make my conception date April 7th, which is the exact night I was with the first man.
Do you think there's a big chance that the 2nd man could potentially be the father? I am hoping the first man is indeed the father, because we have been friends for years, and it would be alot easier to handle. The second man, however, I don't even speak to anymore. I would hate for it to be the second man.
Any advice on people that have gone through this? I guess I just want some confirmation that these ultrasound dates are accurate. The ultrasound tech was amazing, and I feel like she really knew what she was doing, but I just want to make sure that these results couldn't be a whole 7-8 days off.
When you say "conception date", did she actually give you a conception date, or rather did she "date the pregnancy", meaning you were 6 weeks 4 days pregnant?
That's a different conception date.
Do you have a due date? You can work backward from there with a due date conception calculator.
That's a different conception date.
Do you have a due date? You can work backward from there with a due date conception calculator.
yes, we determined it as the conception date...I told her there were two potential men, so I think that's why she did it.
I'm not sure about the due date, I think she said Jan 12th, but I'm not 100% sure, I don't have the info with me.
COMMUNITY LEADER
I would suspect that if the ultrasonographer knew you were worried about conception and not just wanting to know "how far along" you were or other more vague language, she would give you an estimated conception date for sure and not just the medical way of counting pregnancy (which starts from an estimated first day of last period). When an ultrasound is as early as yours was, it is usually pretty reliable. Not to the day, though. But probably within three or four days. The problem is, by your story, you only have seven days' distance between the two men. That's not enough to base the rest of the child's life on.
My suggestion is, consider it as being the first man's, but explain the issue to him so he is prepared if it is not, and have a DNA test done when the baby is born. Only a week apart is just not quite enough for certainty.
My suggestion is, consider it as being the first man's, but explain the issue to him so he is prepared if it is not, and have a DNA test done when the baby is born. Only a week apart is just not quite enough for certainty.
thanks Annie, that's what I'm going with too. Let's hope it's the first man.
He isn't happy about it, and we have only talked once in the past 2 weeks (with him trying to convince me to get rid of it) but I'm hoping that he is just in shock and will come around. I'm not expecting a relationship, but I am expecting him to step up if he is indeed the paternal father.
He isn't happy about it, and we have only talked once in the past 2 weeks (with him trying to convince me to get rid of it) but I'm hoping that he is just in shock and will come around. I'm not expecting a relationship, but I am expecting him to step up if he is indeed the paternal father.
COMMUNITY LEADER
Well, if he is not happy about it, he might indeed not "step up," if you mean be emotionally connected to the child. Get prepared for that. We hear from women all the time who are not married and pregnant after some supposedly fun sex, and they are annoyed or hurt that the dad is not overjoyed. But as far as he is concerned, the woman has unilaterally decided to spring a lifetime commitment (financial for 18 years if nothing else) on them. I am not saying that a woman gets pregnant all by herself, but a lot of women who think they can't or won't get pregnant will say so to the guy, and then lo and behold they are pregnant, and the guy can take that as unfair.
Whoever is the father, the guy will owe child support. But that might be all that can be expected.
Good luck. You're going to have a sweet baby! Get your legal ducks in a row including the DNA testing (which should be handled properly, don't go to the drugstore for a swab kit but get it handled by your lawyer and a certified lab where the guys have to prove their identity), and then forget about it if the father doesn't "step up" in a way you think a father should. You're better off expecting nothing and getting something, than expecting he will love the kid and be a dad, and not getting it.
Whoever is the father, the guy will owe child support. But that might be all that can be expected.
Good luck. You're going to have a sweet baby! Get your legal ducks in a row including the DNA testing (which should be handled properly, don't go to the drugstore for a swab kit but get it handled by your lawyer and a certified lab where the guys have to prove their identity), and then forget about it if the father doesn't "step up" in a way you think a father should. You're better off expecting nothing and getting something, than expecting he will love the kid and be a dad, and not getting it.
Thanks again Annie for the feedback. Yes, I'm giving him the space he needs, and I definitely understand this from his point of view. It was, after all, just an accident between 2 friends who werent being responsible at all. Now I have to deal with the consequences and handle my business. I am a career woman, only a small number of serious relationships, and have never thought that I would be a mom... I truly didnt, but i guess
thats why the "never say never" saying works so well here. If he is not in this person's life, there is nothing I can do. I will do my best as a mother and hope that things work out eventually. I dont wish for a relationship from him, or anything like that. Just to eventually take an interest if he chooses.
If you use the reverse calculator, and plug in Due Date Jan 12, you get April 10 as the "ovulation date".
That splits it right down the middle - this seems too close to figure out without a DNA test.
http://www.babymed.com/pregnancy-due-date-calculator?event=2&cycle_length=28&weeks=5&days=0&ivf_days=3&MM=1&DD=1&YYYY=2013&showResults=1
That splits it right down the middle - this seems too close to figure out without a DNA test.
http://www.babymed.com/pregnancy-due-date-calculator?event=2&cycle_length=28&weeks=5&days=0&ivf_days=3&MM=1&DD=1&YYYY=2013&showResults=1
Thank you RockRose! Yeah that does scare me a bit, but I just have to be strong and believe that the outcome will be good either way.
i had an affair a week or two before my period which started 3/21/12 went to the doctor on 3/23/12 to have an ultrasound done on my pelvis due to me having PCOS I was told that I was not ovulating I had sex a few days after my period with my husband which ended 03/24/12 I found out i was pregnant sometime in April my due date is 12/26/12 is it possible the man i had an affair with is the father i hope not
COMMUNITY LEADER
firegoddess, it doesn't sound like the guy you had the affair with is the dad. Google "conception calculator" and plug in your due date, and you get something like March 29 to April 4 as possible dates for conception. The baby seems to have come after the period which was after the affair. But plug in the numbers for yourself to be sure.
So if I had sex on 2/ 22 and my ex is saying she conceived 3/8 is it possible it took that long to conceive and still be mine?
COMMUNITY LEADER
Boston, if the last time you and someone had sex was February 22, and she absolutely knows she conceived March 8, it is not your baby. However, it is hard for a woman to absolutely know when she conceived, since ovulation doesn't happen absolutely on the same day in a cycle for all women.
It sounds like she has told you the baby isn't yours and you are mildly concerned about whether this could be wrong. You could ask for a DNA test after the baby is born in that case, just to be sure. (But if she asks you to keep it quiet, please be a gentleman and do not tell her present guy if she has one.)
If you are being pressed to take a daddy role and do not want to, absolutely request a DNA test. (And man up if you are the daddy, as of course I am certain you will.)
If you don't want to be the daddy and she doesn't want you to be the daddy, I would take the two-week stretch of time as absolute and would try not to worry. Sperm is not said by any research to live that long in a woman's system.
It sounds like she has told you the baby isn't yours and you are mildly concerned about whether this could be wrong. You could ask for a DNA test after the baby is born in that case, just to be sure. (But if she asks you to keep it quiet, please be a gentleman and do not tell her present guy if she has one.)
If you are being pressed to take a daddy role and do not want to, absolutely request a DNA test. (And man up if you are the daddy, as of course I am certain you will.)
If you don't want to be the daddy and she doesn't want you to be the daddy, I would take the two-week stretch of time as absolute and would try not to worry. Sperm is not said by any research to live that long in a woman's system.
Thank you for getting back so quickly. She originally said it was mine for sure, and I told her I want a test and if it was mine that I would take complete responsibility for it. Than a week later she said I wasn't the only one she was with but the other guy she was with was on 3/16. She wouldn't let me go to dr appt with her and called after to say that they told her she conceived march 8th and due 11/29. I didn't know if it was possible it was mine, but if she is telling the truth about the other guy how cld it be his with her being with him after the conception date.
COMMUNITY LEADER
She might not understand the difference between a doctor telling her "you are x weeks pregnant" and a conception date. (A doctor times a pregnancy by the first day of the last period, or if that date is not known, by an implied first day of the last period. Doctors don't mess around giving conception dates, they don't know what they are. But they can extrapolate from the embryo's size if the mother had an early ultrasound. Given all that, the ultrasound would have to be not much later than the 7th week, to get a very specific reading of possible date of conception.)
In any case, if she is adamant that she did not conceive any earlier than March 8, well, you were with her two weeks before that and no later. Sperm is not generally thought to live longer than about 5 days in a woman's system.
Go with her to the next doctor's appointment if you are concerned, and ask the doctor, specifically using the word "conception" date. Not -- "how far along is she?" or the doctor will give you a timing for the pregnancy that is based on the first day of the last period. Ask also how far along the pregnancy was at the first ultrasound (anything much over 8 weeks means it is not that helpful for dating a pregnancy with precision) and be clear that when any date is mentioned, you ask "Do you mean from the first day of the last period, or from conception?" Pencil it out on a calendar.
In any case, if she is adamant that she did not conceive any earlier than March 8, well, you were with her two weeks before that and no later. Sperm is not generally thought to live longer than about 5 days in a woman's system.
Go with her to the next doctor's appointment if you are concerned, and ask the doctor, specifically using the word "conception" date. Not -- "how far along is she?" or the doctor will give you a timing for the pregnancy that is based on the first day of the last period. Ask also how far along the pregnancy was at the first ultrasound (anything much over 8 weeks means it is not that helpful for dating a pregnancy with precision) and be clear that when any date is mentioned, you ask "Do you mean from the first day of the last period, or from conception?" Pencil it out on a calendar.
I had unprotected sex with someone for like two seconds and stopped without him even coming inside me. A few days later I had my period. Two weeks after that me and my boyfriend got back together and he came inside me a bunch of time from the end of may all the way to June. I missed my period in June and then early July found out I was pregnant. I got an ultrasound at ten weeks and they told me my due date was February 24th and my conception date was right around the first of June. Is my boyfriend the dad?
COMMUNITY LEADER
How far ahead of the first of June was the unprotected sex with the first guy? You said you had it and a few days later got your period, and two weeks later got together with your boyfriend. Was that at the end of May? Making the sex with the other guy in mid-May? (With a period in between that and your boyfriend at the end of May?) If so, doesn't sound like it could be the other guy.
My LMP was October 17th 2012. I had sex with one man the week on Halloween. That around 2 week after my LMP, usually ovulation time frame. Then I had sex with another man using a condom on November 7th. I did not notice the condom breaking. I am worried because I have been trying to get pregnant for 6 years with the 1st man and now I am pregnant. I wish I never had sex with the 2nd man even though it was with a condom. What are the chances the baby is the 1st man's and the chances the baby is the 2nd man's? My period is usually normal, every 28-29 days. Please help.
COMMUNITY LEADER
Hi, Rachel, I'm going to plunk your post into its own thread, since this is an old thread with lots of posts on it. Look for it at the top of the DNA/Paternity forum in a few minutes.
I'm in a very serious predicament, that I have never had to deal with before in my life and I am unable to talk to very many people about this..
I recently found out December 4th that I was positively pregnant, they told me at the health department that I was about 8 weeks along, judging from my LMP. But unfortunately, a few days later, around the 9th or so, I went to the ER over nausea and whatnot, they did an early ultrasound which stated that I was 6 weeks 3 days along. I have been TTC for about 6 months now with my boyfriend/fiance and he is the only person I have been with, but something happened to me, where a friend took advantage of me or raped me when I wasn't in a conscious state of mind. Now, my OB doctor did another early ultrasound, the actual in-office appt early ultrasound, which put me at 7 weeks, she said it is the most accurate, and judging from the measurements and information, disregarding LMP which isn't always accurate (mine was Oct 4th), that my conception date was November 10-11th, she said that it is positively accurate, the unfortunate event which is terrorizing my life - happened November 16th. I'm in complete emotional turmoil, finding it very hard to appreciate and nurture this baby inside of me, due to the underlying feeling of worrying whether the dishonest friend could possibly be the father of the baby I am carrying, I love my fiance and I want his child, it would be a blessing for me to feel comfortable and know that it is our baby together and not a "mistake" (as terrible as that sounds, I'm so sorry!), is there more of a chance of it being my fiance's and not the other person's? Can the OB doctor be right on the conception date and rule out the other person?
Please help me? :(
I recently found out December 4th that I was positively pregnant, they told me at the health department that I was about 8 weeks along, judging from my LMP. But unfortunately, a few days later, around the 9th or so, I went to the ER over nausea and whatnot, they did an early ultrasound which stated that I was 6 weeks 3 days along. I have been TTC for about 6 months now with my boyfriend/fiance and he is the only person I have been with, but something happened to me, where a friend took advantage of me or raped me when I wasn't in a conscious state of mind. Now, my OB doctor did another early ultrasound, the actual in-office appt early ultrasound, which put me at 7 weeks, she said it is the most accurate, and judging from the measurements and information, disregarding LMP which isn't always accurate (mine was Oct 4th), that my conception date was November 10-11th, she said that it is positively accurate, the unfortunate event which is terrorizing my life - happened November 16th. I'm in complete emotional turmoil, finding it very hard to appreciate and nurture this baby inside of me, due to the underlying feeling of worrying whether the dishonest friend could possibly be the father of the baby I am carrying, I love my fiance and I want his child, it would be a blessing for me to feel comfortable and know that it is our baby together and not a "mistake" (as terrible as that sounds, I'm so sorry!), is there more of a chance of it being my fiance's and not the other person's? Can the OB doctor be right on the conception date and rule out the other person?
Please help me? :(
Ok, I'm really hoping someone can help me. My lmp only lasted 1 day on Sept 15, 2012. I had sex with my ex-husband on the 18th one time, and multiple times with my current boyfriend and only him after. Pregnancy was discovered Oct 17 and an ultrasound performed Nov 5, stating that I was 6 weeks 5 days pregnant. I'm just trying to rule out conception from the indiscretion that took place with my ex. I also took an at home test sometime between Sept 28 and October 10 that came up negative. Thanks!
The exact same thing happened to me but the guy who had unwanted sexual contact did it a couple of days after my period, i am also really scared that the father of my baby could be his. I asked about the doctors at my scan and they said it is never possible to say the exact date on conception because sperm lives up to 7 days. I went on a conception calender and it looks like my partner is the father not the other guy, Ive been told its never 100percent though. You can get prenatal DNA tests done but i am not sure if its completely safe or not. I have also gone on various different websites and conception calenders and made a note of what conception dates they calculate. It makes you feel abit better knowing that It kind of rules out the other person.
My due date is August 29th and I need my conception date
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