Conception

iVillage Member
Registered: 04-09-2012
Conception
4
Mon, 04-09-2012 - 12:43am
My last menstrual period was on December 28th. The doctors say I am due on September 28th. I want to know the exact date I could've conceived. I need to know if it could've been anywhere after January 13th?
iVillage Member
Registered: 10-12-2010
In reply to: darcis2
Mon, 04-09-2012 - 7:41am

If I plug in your LMP in one calculator, I get a fertility window of 1/11-1/17. But, that LMP gives you an EDD of 10/4, not 9/28. What are the doctor's basing your EDD on? Have you had an ultrasound?

If you have regular, 28 day cycles (many do not; for example, I have a 25-26 day cycle), with your LMP on 12-28, it is possible you O'd after the 13th according to at least the one site (http://www.americanpregnancy.org/duringpregnancy/pregcalc.html). But, if the EDD is 9/28, your likely conception date is 1/6/12 (http://www.babymed.com/conception-calculator?due-date=9/28/2012). There are a lot of calculators out there -- and a lot of them vary.

The doctor could be wrong about your EDD. So, anything is possible.

HTH. Congratulations on your pregnancy!


Brie
Mom to Libby/17, William/12, and Jacob/8
Community Leader
Registered: 11-01-2011
In reply to: darcis2
Mon, 04-09-2012 - 10:29am

Wendy

iVillage Member
Registered: 04-09-2012
In reply to: darcis2
Mon, 04-09-2012 - 10:29am
I got an ultrasound done and I was 10 weeks or close to it, I am now 15 weeks. Does that help?
Community Leader
Registered: 11-01-2011
In reply to: darcis2
Mon, 04-09-2012 - 10:35am
Here's the calculator I used....http://www.baby2see.com/conception_calculator.html You should discuss this with your ob and see if they can help you figure it out. There are so many elements that come into play.

Wendy