Agree with above post, but I used to feel when I was ovulating as I would get a bit of an ache on alternative sides. I also calculated when I was ovulating my counting on from the date of my last perion and tried having sex 10-14 days after, but did do it in-between as all women vairy!
A doctor's advice on a show once said that doing it about 3 times a week is best if you want to give yourself the best chance, but every doctor/expert might think differently!
Good luck and happy trying!!!!!