If your girlfriend doesn't know the conception date, I don't think there's really any way anyone could tell you.
Even a baby's due date or actual delivery date offers no real clue as to the exact date of conception.
You might try the conception calculator linked under more info in the right column.
You can always get a DNA test, or you can trust your girlfriend and love the baby as your own any way.
A women generally ovulates 14-18days after the first day of her last menstrual period. If you know the first day of your last menstrual period then you can estimate the week conception occurred.
Given that sperm can live for days within the women, during the conception date may be difficult. If a women has sex on Friday, Saturday and Sunday with three different men, any of them can be the father.
Set your mind at ease and get a DNA test.
You really won't be able to pinpoint the exact date. you can find aproximately by knowing the day her last period started and how long her cycles are. It would be an aproximation though.
http://thefertilityshop.com/ovulation-calculator.htm
Hopefully you are still on good terms with your girlfriend, if you should attend the doctor visits, then one thing is of great help, when the first ultrasound is given, hopefully before the 11th week, there is a measurement that is given called a crown rump length, this is very very accurate in telling the gestational age of the child. after the 13th week, the baby is able to curl so the accuracy is not there, the spinal segements have formed. Crown rump length will give you a very accurate date. Good Luck. I hope everything works out for you.
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Related Questions
Is there a formula I can use to figure out my due date?
If you know your date of conception, all you have to do is add 9 months to find out your approximate due date.
What if you dont know when your last period was and am pregnant how do I calculate conception day.?
Find out when your due date is because you can work out your conception date from that
How accurate are blood pregnancy tests at predicting the exact date of conception?
They are quite accurate, but no-one can know for sure when the conception date was
Can you be sure who the father of your child is if you slept with 2 people 5 weeks apart?
You would need to know your conception date and go from there. If the date is not a pin point date, you might opt for a DNA test.
I dont know when my last lmp was or when the conception occured i know my due date is May 9 2008. I made a mistake and cheated on my husband on August 122007. i need to know exact conception date?
id say in July would be conception cuz if you count from august to may that's ten months!! Id say that conception occured around August 17th. In order to calculate the date of conception, Google 'how to calculate dates of conception' Healthlink is the best site, they allow u to calculate backwards from your due date to conception.
If you know the date of conception FOR SURE how can you figure out your due date from that All the calculators put my conception date based on my cycle wrong therefore the due date is wrong?
I don't know, because I can't find one either. I do know that calculating from the fist day of your last period is NOT accurate especially if you practice fertility awareness. The first day of my last period was over 50 days ago and I just ovulated.
How can you know the exact date where you get pregnant?
There is no scientific way to pinpoint the date of conception. You can only know an approximate date based on the age of the fetus.
How do you tell your due date?
To find your due date you need to know either your conception date or the date of your last period.
How do you know the date of conception?
See the Related Link for "Pregnancy date calculator" to the bottom for the answer. Next time you see your doctor, ask them the estimated date of conception. They may be able to give you a more exact date.
How do you work out conception date from due date?
You can use a pregnancy conception calculator to determine when your baby was conceived. In order to find out your pregnancy conception date you need to know the date of your last menstrual period, the average length of your menstrual cycle and the average length of your luteal phase. Knowing the length of your luteal phase is very important to accurately determine the conception date.
What is my due date if i am 23 weeks and 3 days?
Only YOU can answer this - Only YOU (and your partner) know the date of conception !
How do you no what date you got pregnant?
If you know your due date, the doctor or midwife can probably tell you when (roughly) you got pregnant. Also, there are many online sites that can tell you your conception date if you know your due date
If the baby is due 14th march 2008 what is the date of conception?
If you don't know your date of conception, it is unlikely you have a "perfect" due date - however, the due date is not usually the day that the baby arrives. Any day that anyone gives you from the information you have provided will be, at best, a guess.
What is my due date I definitely conceived on Feb 14 but dont know the date of my last period?
nice conception date! You due date is roughly 6th November 2008
Is it good if your father figure is oyur best friend?
Yes it is. My best friend is my father figure and i dint know what i would do with out himhe is also my cousin.
Is pregnancy 38 or 40 wks?
pregnancy lasts for a periods of 40 weeks from last missed periods. Pregnancy lasts for 38 weeks from the date of conception. Normally you do not know the date of conception. The date of last periods is taken normally to calculate the weeks of pregnancy.
If a baby was born February 14 what is its conception date?
May 23rd. I know from experience, I had a baby on Feb 14th.
Will there be any physical signs on the date of conception to know you have conceived?
Not necessarily, though minor spotting may occur.
When did you get pregnant if your due date is September 12 and your last period was December 5?
Your due date is calculated from the date of your last period, which is information that you supply. Actual date of conception is known only if you know it.
When did you get pregnant if your due date is may 26th?
May 26th 2010? Your rough conception date would be September 1st 2009, give or take a few days. However, it is very difficult to accurately know when a conception date was. It is best to speak to your doctor, midwife or obstetrician to get a more accurate answer.
You know you are 4 months 3 weeks and 2 days pregnant due to Fetal measurements but how do you figure out your conception date?
There are literally countless different brands of a/c units for apartments. When looking for quality though you can go with a air master small wall mount a/c system. Which will cost you about 300 dollars.
Would excessive drinking the first trimester alter the measurements of ultrasound to determine size and conception date And if so how many days off could it be?
NO ultrasounds measure amniotic fluid and the fetus head, this would not alter you're conception date. If you wanna know you're conception date go to www.webmd.com and they will calculate the time you conceived based on you're due date. It's just an estimate. GOd bless
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my due date is jan 31 but i dont know my lpm date according to due date can we figure out my lpm date
If your due date is March 19th did you conceive on May 27th?
The approximate date of conception was June 12 because you follow Naegele's rule so you would add 3 months and subtract 7 days to find the date of conception. If you know the last date of your menstrual cycle you subtract 3 months and add 7 days to find your due date.
Can one determine the date of conseption closer that two weeks?
I am guessing you mean that you want to know your date of conception? It really depends on a couple of factors. If your normal periods are regular, you can be fairly accurate with conception date within a couple of days. Count back 14 days from when your period was DUE (ie but didn't come because you were pregnant) and this will be around the time of conception. Conception date will be within two days either side of this date. If you are pregnant now, an ultrasound will tell you very accurately what your conception date is. As long as you have an ultrasound within the first 10 weeks - the earlier the better. An experienced ultrasonic person can tell you down to the day - ie six weeks and three days.
