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Doctor insights on: When Is My Baby Due Based On Conception Date

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My due date is 3/13/16 based on my last period and 3/8/16 based on my 20 week ultrasound. When did conception most likely occur?

My due date is 3/13/16 based on my last period and 3/8/16 based on my 20 week ultrasound. When did conception most likely occur?

Depends: If you google "pregnancy calculator" you will find a few different ways of looking at this. The fact is, there is no definite answer. You can find a range based on best guesses. It depends on when exactly you ovulated. ...Read more

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Conception (Definition)

Conception is the union of an egg and sperm to form a zygote. The zygote is what ...Read more


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My due date is November 6, so when was the conception date/range?

My due date is November 6, so when was the conception date/range?

Approx. Feb, 13: With an EDC of 11/6/14 and normal 28 day cycles, LMP would have been around 1/30/14, pregnancy today (8/8/14) is at 27 weeks gestational age, or 189 days, fetus is approximately 14.41 inches long, and weighs approx 1.93 lbs (875 grams). Congrats!! Remember, 2/13 conception date is plus or minus 3-4 days (viability of sperm and irregularity of ovulation can change the above). ...Read more

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If my due date is 1/28/13 when was my conception date?

If my due date is 1/28/13 when was my conception date?

How many times ahve : You asked about your conception date, please ask all future questions to your OB doc since I am sure u must have one since u are 28 weeks gestation now , and I have already answered your question at least 2 or 3 other times and u keep changing the dates , it is tyour ob's job to tell u when u are due, so call or see your OB tomorrow to discuss this just like I do with all of my patients. ...Read more

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Ultrasound dates use gestation age which is based on LMP not on conception correct ? So i couldn't have gotten pregnant before the date that was given

Ultrasound dates use gestation age which is based on LMP not on conception correct ? So i couldn't have gotten pregnant before the date that was given

Maybe: EDD are based on 40 weeks from last known normal menstrual period, or 38 weeks from known conception date.U/S dating is based on a database of average fetal anatomic measurements (size of head, abdomen, leg etc) for a particular age.The computer in the ultrasound machine calculates an EDD based on the average of these measurements. In the first trimester, U/S dates are accurate within 5-7 days ...Read more

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My due date is 3/20/14 when was my conception date?

June 2013: Your conception date would have been about 6/27/13. Certainly this could be off a week or so depending on how regular your periods are and how early in the pregnancy you had a dating ultrasound - the earlier it is the more accurate. ...Read more

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If my estimated conception date is december 6 based on early sonogram what is the likelihood of it being from sex on november 29th unlikely right?

If my estimated conception date is december 6 based on early sonogram what is the likelihood of it being from sex on november 29th unlikely right?

Depends: Ultrasound performed at 7-10 weeks is supposedly accurate to within 3 days. The later the ultrasound, the less accurate it is. If ultrasound done at 15 weeks, it can be more than a week off in determining gestational age. If you had a transvaginal ultrasound at 7-10 weeks and it gave you a conception date of dec. 6, you very likely conceived between dec. 3 and dec. 9. At 15 weeks, nov. 29-dec 14. ...Read more

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If my date of conception is consistent, with my due date is it accurate?

If my date of conception is consistent, with my due date is it accurate?

Probably: The conception date should be about 2 weeks after the first day of the last period. The best way to know if that is accurate is with an early (less than 20 weeks) ultrasound. ...Read more

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Can one figure out when the due date is based on when implantation occurred?

Can one figure out when the due date is based on when implantation occurred?

Not really: If - "if" - you knew for certain when implantation occurs you could figure out a due date based on this. Even with ivf cycles we don't "know" the implantation date, we calculate based on egg retrieval/embryo transfer dates. "implantation bleeding" is mostly nonsense and should not be relied on. ...Read more

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If my conception date is may15 when is my due date and my last period?

If my conception date is may15 when is my due date and my last period?

EDC Feb 5, 2013: If you have perfect 28 day cycles & conceived 14 days prior to your next expected cycle; your due date would be 2/5/2013 & your lmp would have started around 5/1/2012. Your 2nd trimester started 7/31/12 and today (11-1-12) you are approximately 26 weeks & 2 days or 184 days & your infant would weigh approximately 1.68 pounds (760 grams). Take care. ...Read more

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My due date is sep 11, putting conception between dec 14-19. If the due date is accurate, how possible is it that conception occurred after the 19?

My due date is sep 11, putting conception between dec 14-19. If the due date is accurate, how possible is it that conception occurred after the 19?

Conception: Only you can answer this question. Only you know when your last menstrual period was. You can confirm nearly every single piece of information about your pregnancy on the internet. Conception calculators are a good place to start. For your due date conception occurred 12/19/2013. Here is the calculator I use: http://www.babymed.com/pregnancy-due-date-calculator ...Read more

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I'm 13weeks and 6days pregnant my LMP was around the 28th(estimate ) of november. My due date is 9/10/14. Could my conception date be dec19? (sex)

Calculator : Use a reverse due date calculator for free online and this will be easy for you to find out. Simply type in your due date and the conception date will be calculated for you. ...Read more

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When most likely was my conception date if my due date is may 14th?

Sex for Conception: Conception calculators are all over the web and can be fun to play with. For this due date sex had to occur 8/16/2013 to 8/21/2013. ...Read more

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My due date was 30th march 2013. When is it likely i conceived? Also, is the conception date the day that you have intercourse?

Check calendar: There are conception date calendar calculators on the internet. The link below is one. It also answers your question about the conception date re: intercourse. http://www.baby2see.com/conception_calculator.html#conceptioncalculator. ...Read more