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Doctor insights on: Calculate Date Conception

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How to calculate date of conception?

How to calculate date of conception?

See below: Subtract 3 months from your first day of your last menstrual period, then add 1 week. ...Read more

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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How to calculate date of conception if two guys?

How to calculate date of conception if two guys?

See your OB: Not a good situation, your OB can do an ultrasound for dating purposes and blood tests can be done on the baby after delivery and the 2 guys to determine who is the father if necessary, so see your OB on monday. ...Read more

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Tell me how do you calculate date of conception?

Tell me how do you calculate date of conception?

Depends: Conception usually occurs about 14 days prior to the onset of the next expected period. If the periods are 28 days apart, conception occurs around day 14. If the periods are 32 days apart, then conception occurs on day 18 (32 minus 14 = 18) etc, etc. ...Read more

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Can you tell me how to calculate date of conception from due date?

Can you tell me how to calculate date of conception from due date?

38 weeks earlier: If your periods were every 28 days, your OB can help you figure it out that is part of your ob's job. ...Read more

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Can you accurately calculate date of conception if you have irregular cycles? Early US & 6w 1d said EDD was 4/16. 14 weeks later @ 20w EDD said 4/13.

Can you accurately calculate date of conception if you have irregular cycles? Early US & 6w 1d said EDD was 4/16. 14 weeks later @ 20w EDD said 4/13.

Conception: It is not possible to calculate with certainty both due to your irregular periods and the limits of ultrasound dating, meaning it is always +/- at least a few days. If you are trying to determine paternity, you will have to do so post birth. ...Read more

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How to calculate the date of conception backwards?

How to calculate the date of conception backwards?

Use an app: There are many apps available where you can enter your due date and get the date of conception (look for "pregnancy wheel". Alternatively, if you know what week you are today, convert the weeks into days (for instance, 18 weeks and 3 days equals 129 days), then subtract 14 days (129-14=115), then count back that number of days. This will give you your conception date. ...Read more

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Need to know how to calculate conception date from due date?

Need to know how to calculate conception date from due date?

Naegle's rule: By universal convention, a pregnancy is dated in weeks since the date of the last menstrual period. The due date is 40 weeks from the first day of the last period or approximately 38 weeks after date of conception. Your OB can give you a better answer after your first early ultrasound around 8 weeks.... ...Read more

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How to calculate due date from conception and ovulation test?

How to calculate due date from conception and ovulation test?

Your OB can: Show you on an OB wheel you are due 38 weeks from your conception date if you were having 28 day cycles. ...Read more

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How to calculate due date from conception date if positive ovulation test?

U are due: 38 weeks from the conception date, your OB can show you on your ob's pregnancy wheel, and I am sure your OB will get an ultrasound for dating and viablity also. ...Read more

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I have an irregular menestration, 2-4months between periods. How do I calculate my conception date?

I have an irregular menestration, 2-4months between periods. How do I calculate my conception date?

Ultrasound: When you have an irregular menstrual cycle, it is very difficult to pinpoint your due date. Even if you are irregular, we would date your pregnancy based on the first day of your last menstrual period (lmp) unless a sonogram in the first trimester disagrees. In my practice, I would do a sonogram to establish the dates around 9 weeks or so based on your stated lmp. ...Read more

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Why don? T they calculate due date by day of conception?

Unsure: Because the majority of women do not know when they conceived; many can give a good report of when their last period was. ...Read more

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How to calcuate conception date with estimate due date of nov. 30, 2013?

Naegele's Rule: The naegele's rule estimates the expected date of delivery (edd) by adding one year, subtracting three months, and adding seven days to the first day of a woman's last menstrual period (lmp). Just apply in reverse: last menstrual period was about 2/20/13: conception two weeks later. ...Read more

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Am preg. My last period is 4/13-4/18. Am trying to calculate when I get preg. It so confusing. When do I ovulate and conception or conceived happen?

Am preg. My last period is 4/13-4/18. Am trying to calculate when I get preg. It so confusing. When do I ovulate and conception or conceived happen?

About seven weeks: In a 28 day menstrual cycle, ovulation occurs approximately on day 14. Being june 2, 2013 today you are approximately seven weeks and one day. Your due date is approximately january 18, 2014. ...Read more

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How is conception date calculated by first trimester ultrasound?

How is conception date calculated by first trimester ultrasound?

Measurements: US uses measurements of the gestational sac and then the growing fetus to date a pregnancy. The appearance of the heart beat. Usually measurements are compared to standards for various parts of the pregnancy and a date assigned. ...Read more

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How are conception dates calculated if I don't have a regular 28 day cycle but had a transvaginal u/s done 6/11 dating me 6 weeks 3 days?

Conception dates: If the sonogram determined that you are 6 weeks 4 days then you conceived 2 weeks 3 days ago. That is because obstetricians by convention date the pregnancy from last menstrual period. ...Read more

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When is pregnancy calculated first day of last period or conception because my LMP is 9-8 40 weeks from that would give me a due date of 6/15?

When is pregnancy calculated first day of last period or conception because my LMP is 9-8 40 weeks from that would give me a due date of 6/15?

40 weeks from LMP: 40 complete weeks from the first day of the last normal mentrual period. With uncertain lmp, dating is by ultrasound, but if within 1 week to lmp, then menstrual dating is still used. Obstetrical dating is never based on conception, even with ivf pregnancies. ...Read more

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What's the best way to date conception?

What's the best way to date conception?

Early ultrasound: Assuming that you aren't using in vitro fertilization, which of course gives the doctor the exact date of conception. Most women date a pregnancy by having a first trimester ultrasound. Ultrasounds performed between seven and nine weeks just station provide the most accurate measurements for dating a pregnancy. As the pregnancy progresses the ability to date accurately diminishes. ...Read more

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Due 08, 29, 2013, conception date range?

Around december 6: If your due date is 8/29 you probably ovulated around 12/6. There are due date calculators and pregnancy wheels that you find on the internet that can help you find out. ...Read more

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Explain due date based on date of conception?

Due date: The normal term pregnancy last 40 weeks. This is calculated from the last menstrual cycle. The last menstrual cycle calculation relies upon the fact that ovulation occurred on day 14. But if calculations are from the date of conception then the pregnancy is only 38 weeks. ...Read more

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Are ultrasounds the best way to date conception?

Are ultrasounds the best way to date conception?

Noninvasive: It is a way to do it other than if you know exactly when you got pregnant, it is noninvasive, no trauma involved and no radiation to the fetus. ...Read more

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If my conception day is may 6th when is my due date?

If my conception day is may 6th when is my due date?

January 27, 2013: Due date is about 38 weeks after conception date. ...Read more

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Are ultrasounds pretty accurate with conception dates?

Are ultrasounds pretty accurate with conception dates?

Yes: Ultrasound dating is most accurate early in the pregnancy using the crown-rump length (crl) of the small fetus. The measurement can be done starting around 6 weeks. While crl can be used for dating until 12 weeks, it is most accurate during 6-8 weeks when the accepted error is only about 3 days from actual date. ...Read more

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Hi dox I'm due august 30th wondering my conception date?

Hi dox I'm due august 30th wondering my conception date?

What u do: Is get a calendar and subtract 38 weeks. That was around the time of conception. Sperm lives up to 7 days so conception does not happen the day of the intercourse which caused the conception. Good luck and congradulation's. ...Read more

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My due date is january 30 2014 when was my conception time?

5/9/13: Your average conception date would be 5/9/13, give or take a few days on either side. Hope that helps! ...Read more

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