How accurate is this ovulation calculator???

Just curious how accurate you ladies think this calculator is? Also....what days would you BD based on the following info?????TIA

BabiesDirect's Ovulation Calculator
Enter in the dates of the first day of your last three menstrual periods. (If you can not remember these three dates, then enter in the first day of your last menstrual period.)

The Start Date of your last menstrual period: APRIL 20

You previous menstrual period before the above: MARCH 18


Preceding menstrual period: FEB 14
(Around 3 months ago)


Your menstrual cycle is approximately:

33 days long

Date of next menstrual cycle should be:

5/23/09


When am I Fertile:
On this Date you START your highest fertility: 5/4/09
On this Date you END your highest fertility: Ovulation Date 5/9/09
REMEMBER: These dates given here are estimates

CAUTION : This calendar should not be used to prevent pregnancy.

Source: Copyright (c) 1996 - 2002, WebMD, Inc. All rights reserved

Message edited 5/8/2009 9:26:23 AM.

Re: How accurate is this ovulation calculator???

that seems pretty accurate. if you have an average cycle length of 33 days, then i would think that you would O around CD19, which would be may 9th right?

are you using OPKs at all?

if not, i would BD tonight, tomorrow and again on sunday if possible, and every other night after that until AF shows. i would hate to O late and miss the opportunity.

good luck!!!

Re: How accurate is this ovulation calculator???

Thanks LB....I sent you a FM.

Has anyone else used this particular calculator? The only other ones I've found only have a spot for your last period and it assumes you have a 28 day cycle. I'm not that consistent anymore and need one to enter multiple CD1's

Re: How accurate is this ovulation calculator???

i used to use the calculater on mymonthlycycles..
it worked for me the first try.. of course OPK's are more reliable..

if you use the calculator.. it will be more of a help if you are regular with your cycles.. and the length of your LP. it just gives you a better idea of when to BD.. its a good source and its nice to have free information!

Re: How accurate is this ovulation calculator???