Just wanted to recomment a little gadget I have called the Isis Scope
Its a fertility microscope - you lick the lens, read the result (spots is not fertile, fern structures mean fertile) You can use cervical mucus too if you've just brushed your teeth or smoked, drunk wine etc...!
Anyway I bought one 18mths ago and have a 9 month old daughter now! It looks exactly like a lipstick so you can carry it about easily and at about £20 and reusable is a lot cheaper than buying loads of ovulation tests as I was.
This just really helped me so thought I'd pass it on! Babydust to all.... *