You are most fertile on days 10-16 in your cylce. Day one being the day you start your period. Also you do not want to have sex everyday you want to do it every other day. So you want to have intercourse on days 9,11,13,15, and 17 just for good measure!! Hope this helps this is the method we used to conceive our youngest.
you also have to check what kind of cycle you have everybody don't ovulate the same. The best way with me was checking the cervical mucus. The mucus should be strecthy and looking like egg white. Don't look at it after intercourse because you can get it mixed up with arousal fluid or his semen. Check in the morning or after work.