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Since most women do not know when they ovulated the best way for medical practitioners to determine the age of your pregnancy is to use something that most women do know and that is the start of their last period. When you ovulate during a cycle can vary so by going by date of last period puts everyone on a similar timeline. The first ultrasound from 7 to 12 weeks can determine actual age of the baby very accurately and give you a very good estimation of due date.

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Q: Why is the conception date and how many weeks pregnant different?
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November 21st 2008 you were 27 weeks and 3 days pregnant when is your conception date?

When is your due date?


When did you conceive if you were 25 weeks pregnant on November 1?

The approximate date of conception was May 25th


What does date of conception mean?

AnswerThe date of conception is the date that someone gets pregnant - the date the sperm fertilises the egg.AnswerFertilization of an ovum by a spermatozoon. The most likely date of conception is two weeks after the start date of the last menstrual period.


When did you get pregnant if my due date is December 18?

Based on a normal gestation period of 40 weeks the conception date was March 27th


If your due date is January 31 2010 when did you get pregnant?

The approximate date of conception was May 10th 2009


When did you get pregnant if your due date is october 27th?

The approximate date of conception was June 6th 2009


If you were 6 weeks pregnant when was the conception date?

No, not necessarily. How far along you are is estimated based on the first day of your last menstrual cycle. For example, if you just missed your period, then you're probably already 4 weeks pregnant!


When did you get pregnant your due date is July 17 2010?

Based on a normal gestation period of 40 weeks the conception date was October 24th 2009.


If your due date is March 15 2010 when did you get pregnant?

Based on a normal gestation period of 40 weeks the conception date was June 22nd 2009


Your due date is october 13th what day did you get pregnant?

Based on a normal gestation period of 40 weeks the conception date was January 20th 2010.


What was the conception date if I'm 20 weeks now?

if u are 20 weeks lmp you got pregnant 18 weeks ago so count back 18 weeks but if u want a date u need to give due date or lmp


When did you conceive if your first ultra sound was on April 26 2007 and you were 11 weeks pregnant?

count 11 weeks back from April 26 and that will be your date of conception