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?
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

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 - 10:29am

Wendy

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