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
20 weeks would be the END of your 5th month.16 weeks is the END of your 4th month. Since almost no one knows the exact date of conception, there is always a 5-10 day latitude for you estimated date of conception [EDC ] .
Erm ... 20 weeks and four days ago ... Dohh!! Look at a calendar and count backwards 20 weeks, then backwards 4 days - there is your estimated date of conception.
The approximate date of conception was February 27th 2009
If July 20th was calculated as your due date early in your pregnancy the date calculator works. However if your baby was born at term on July 20th and you are working backwards from that date you could be 2 wweks out either way.
usually conception happens between 12-14 days after your last period began. so say your last period was June 1st then you would probably have conceived June 12 th to the 14th. a woman ovulates for approx. 24-36 hours. depending upon the regularity of your period, (how many days between cycles) some woman ovulate 12,14 or 16 days between each cycle.
The approximate date of conception was June 27th
Go to a search engine and type in "pregnancy calculator". Several sites will pop up saying they have one. What's great about this is if you have a cycle that isn't 28 days, you can get a more accurate due date. Now, I conceived approximately November 15th on a 28 day cycle and my due date is August 22nd if that helps. However you have to keep in mind that doctors consider the first day of your last period as the conception time. That leaves room for up to 2 weeks error on the due date. If your due date is 20 September than you most likely conceived on or around 29 December. I have provided you with a site below that gives you an accurate reading on conception dates, due dates based on menstrual dates. http://www.genetree.com/about/conception-calculator.asp
There are handy calculators around the web to figure this out, or you can count back 9 months from your due date (February 8) and add two weeks (February 22) to get a rough idea of conception. I put your information into a calculator athttp://www.baby2see.com/conception_calculator.html#ConceptionCalculatorand the results it came up with were: First Day of Last Menstrual Period:February 2, 2008Probable Date of Ovulation: February 16, 2008Possible Dates of Conception: February 12 to February 20, 2008Due Date: November 8, 2008 (40 weeks)
Absolutely not. The later in pregnancy the less accurate the scan. The first two giving a due date of October 2nd will be correct and give you a conception date of around January 9th.
On or around October 20, 2005. The best time for delivery is exactly 40 weeks gestation for human births. However, not everyone makes it that exact time. Women can go into labor two weeks before or two weeks after.
A little over 18 weeks until November 20 2010 (from July 14 2010).
41 weeks before December 20, 2014 was March 8, 2014.