Do you know how long your cycle is? If it's an average 28 day cycle, you would want to count back 14 days from when your next is due and then have sex roughly a week or so before that. According to a thingy I looked up, it states (if you have a regular 28 day cycle) and are wanting a girl you should have sex the 28th, 29th and 30th.
Be warned, this is ONLY a chance.
clysta is right.....if you know exactly how long your cycles are and they are not irregular you can calculate a best guess of when you will ovulate....the 3 dates given are the possiblities but i would only have sex on one of those 3 days and then not again until after you know you ovulated...
again it's only a chance but i have heard other women say it worked for them
best of luck in TTC
Nothing I can add that the other two ladies haven't already mentioned :)
http://www. ********* .com/ ovulation-calendar.html
This is what I used to know when I was ovulating. It will also give you the best days for conceiving a specific sex.
Remove the spaces in the address though.
the stared out word was Baby hopes