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Doctor insights on: Due Date Based On Conception Date

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Explain due date based on date of conception?

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

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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If due date was june 3 based on LMP of aug 27, then it changed to may 31 after u/s, could this be bcuz i ovulated sooner? Conception date different?

If due date was june 3 based on LMP of aug 27, then it changed to may 31 after u/s, could this be bcuz i ovulated sooner? Conception date different?

Yes to both. : Is very common to have the due date changed based on the findings at ultrasound. It is often around a month off because it is frequently such that one does not ovulate when they thought they did, but actually ovulated the previous month or in fact a later month. So your findings are common and should be believed because the early ultrasound is extremely accurate. ...Read more

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

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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My due date is june 18th what was my conception date?

This is an approx: Likely around September 26, 2015. However this is not exact. ...Read more

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

Nagle's rule: Approximately march 14 2012. This is assuming you have normal 28 day cycles (a menstrual cycle is defined as the number of days from start of one period to the start of the next. If your cycles are shorter or longer you may have to add or subtract days to adjust. However, this is only an approximation. ...Read more

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If my due date change does my conception date change also ?

If my due date change does my conception date change also ?

Depends : If the due date changes by a month based on ultrasound findings, then this does change conception date. Less than that it's hard to say. ...Read more