there are quite a few ways to check for ovulation the most reliable i have found is cm (cervix muscus).
your cervix products some type of mucus most of the time the type of muscus you are looking for to let you know you are fertile people refer to as ewcm (egg white cervix mucus). they call it egg white because thats what it looks like when you test for cm you should able to pull the cm apart alittle.
checking the cervix
find a postion you like some like one leg on toliet other like sitting on the toliet and others like lying down find what suits you.
then put 2 fingers inside your vagina as high as you can but it shouldn't be painful or uncomftable.
when you pull your fingers out example your cm on your fingers it should be one on the following.
the proper way to do it is this but i find the top works if it doesn't for you try this way.
Insert two clean fingers in your vagina until you can feel your cervix
One finger should be on each side of the cervix
Press gently against your cervix
Collect the fluid by moving your fingers to the opening of the cervix
Remove your fingers and pull them apart slowly
Make your observations in a daily journal
Dry: Record “dry” if you have no cervical mucus present. If the outside of your vaginal feels dry and you have no cervical mucus. You may most likely experience dryness before ovulation after your period and after ovulation.
Sticky: Record “sticky” if your cervical mucus is glue-like, gummy, stiff or crumbly, breaks easily and quickly and if it is not easily stretched. It will probably be yellowish or white, but could also be cloudy/clear.
Creamy: Creamy cervical mucus is close to hand lotion. It can be white or yellow or cloudy/clear, like milk or cream, mayonnaise or like a flour/water solution. It may stretch slightly and break easily.
Watery: “Watery” cervical mucus is clear and most resembles water. It may be stretchy also. This cervical mucus is considered fertile and this may be your most fertile cervical mucus or you may get it before you get egg white cervical mucus or you may not get this type of fluid at all.
Eg
g white: This is your most fertile cervical mucus. Record “egg white” if your cervical mucus looks at all like egg whites. It should be stretchy and clear, or clear tinged with white, or even clear tinged with pink. It also resembles semen (and has a lot of the same physical properties to allow the sperm to travel and be nourished). You should be able to stretch it between your thumb and index finger.
take a look at these pics
Cervical Mucus In The Luteal Phase (pictures) - My Fertility Awareness