Top
20
Doctor insights on: Edd And Conception

Share
1

1
What do dating ultrasounds date? Conception, lmp, or due date?

All : All if those can calculated after obtaining the gestational age. ...Read more

Conception (Definition)

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


2

2
Ultrasound says february 7th as conception date. When us my conception window for fertility?

Ultrasound says february 7th as conception date. When us my conception window for fertility?

More info Please!: Would help to know how far along your pregnancy was when you had the sono? What was the first day of your last menstrual period (lmp)? Are you asking during what period of time you could have conceived or when sexual relations could have resulted in your pregnancy? ...Read more

3

3
Is conception more accurate based off LMP or 9 week ultrasound?

Is conception more accurate based off LMP or 9 week ultrasound?

Both is best: The most accurate dating is where the 1st trimester ultrasound is within a week of the lmp dating; that confirms the lmp dating. If the 9 week ultrasound gives dates greater than 1 week from what's predicted by the lmp then the lmp is not accurate and the ultrasound dating should be used. ...Read more

6

6
Do ultrasounds add two preconception weeks when measuring baby? If baby measures 12 w is this supposed to date to LMP or conception?

Do ultrasounds add two preconception weeks when measuring baby? If baby measures 12 w is this supposed to date to LMP or conception?

Yes. LMP.: The gestational age (number of weeks pregnant) stated in the result of the ultrasound already added the 2 preconception weeks. If the ultrasound dating says 12 weeks gestation, that means 12 weeks since the estimated start of the last menstrual period (lmp). ...Read more

8

8
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

9

9
Are first trimester ultrasounds better at estimating conception or lmp?

Are first trimester ultrasounds better at estimating conception or lmp?

Better than later: A pregnancy dating ultrasound done at 8 to 11 weeks of pregnancy is pretty accurate when done by an experienced technician. The estimate can be a few days or a week off in either direction. ...Read more

10

10
Can trans-vaginal ultrasounds pick your LMP date?

Can trans-vaginal ultrasounds pick your LMP date?

No: If you are pregnant and you don't know when was you lmp and ultrasound can help determine gestational age but it does not tell you when was you lmp. ...Read more

12

12
If my due date is nov22nd conception date march1st and ovulation february 22nd what's an estimate date of when sexual intercourse took place?

If my due date is nov22nd conception date march1st and ovulation february 22nd what's an estimate date of when sexual intercourse took place?

No telling: Sperm live inside the female reproductive tract for up to 7 or more days; however, when trying to get pregnant you should not count on sperm more than 2-3 days. The egg is only viable for about 12-24 hours after ovulation. Therefore, conception is rare if sex occurs after ovulation. I hope this info helps you understand how your conception may have occurred. Best wishes. ...Read more

13

13
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

14

14
Dd may 11. Lmp august 3. Both the 9 week and 20 week us dates match LMP with gestational size. How to i get conception date? Cycle may not be 28days

Dd may 11.  Lmp august 3. Both the 9 week and 20 week us dates match LMP with gestational size. How to i get conception date? Cycle may not be 28days

Conception: Conception calculators are all over the web. The closest you can get is a five day window. For your pregnancy conception occurred with sex from august 13, 2013 to august 18, 2013. ...Read more

15

15
If my edd is 7/20/14 according to 1st vag u/s (lmp 10/17/13 edd 7/24/14) when is estimated time of conception?

If my edd is 7/20/14 according to 1st vag u/s (lmp 10/17/13 edd 7/24/14) when is estimated time of conception?

Calculate Conception: Conception calculators are all over the web and are good sources of information and entertainment when pregnant. I use this one: http://www.Babymed.Com/pregnancy-due-date-calculator. For your pregnancy sex occurred, as expected, after your last menstrual period from 10/22/2013 to 10/27/2013. ...Read more

16

16
How to calcuate conception date with estimate due date of nov. 30, 2013?

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

17

17
Based on an ultrasound at 9 weeks how can I estimate my ovulation/conception date?

Based on an ultrasound at 9 weeks how can I estimate my ovulation/conception date?

Ask your Doc: An ultrasound date of 9 weeks is fairly accurate so your doc can extrapolate backwards and calculate when you most likely ovulated and which days you most likely conceived. For example, if you were 9 weeks today (11-14-2012) you most likely conceived around 9-26-12 (7 weeks ago). Remember conception age is always 2 weeks less than the gestational age we calculate. Take care. ...Read more

18

18
Dated 12 weeks 4 days on 7th Aug (first trimester), no lmp, how accurate is CRL? and is this age from conception?

Dated 12 weeks 4 days on 7th Aug (first trimester), no lmp, how accurate is CRL? and is this age from conception?

Very accurate: Determining gestational age by crown rump length during the first trimester of pregnancy is very accurate. The determined gestational age pretends that there was a menstrual period that started in this case 12 weeks plus 4 days before the day of the ultrasound. Conception would have been about 2 weeks after this assumed first day of LMP. ...Read more

See 1 more doctor answer
19

19
Is a due date and conception date calculator helpful?

For Ob- yes: The "wheel" as it is known, is very helpful for your doctor. For most patients, it is a source of confusion. ...Read more