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I have hard time reading medical stuff without feeling queezy. I've been trying to get through this
http://en.wikipedia.org/wiki/Fertility_awareness for a few days now. The goal is to avoid pregnancy.
This website
http://www.beautyandlace.com.au/fertile.htm mentions:
"Now days, there are ovulation tests available which clearly determine when a woman’s fertile period is. These tests are based on measuring levels of LH (Luteinizing Hormone) in the woman’s blood. A surge of LH is a key indicator that ovulation is about to occur, usually within 12 – 48 hours. Once the surge is detected, intercourse over the next day or two has the most chance of resulting in conception.
"LH detecting kits have been available in the USA for some time, but are newer and generally more expensive in Australia. Simple, urine based LH tests can now be obtained in Australia."
Are these tests 100% effective?
Something else mentioned is
http://en.wikipedia.org/wiki/Basal_body_temperature
From which part of the body are you supposed to take the temperature every morning? Again, how effective?
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This kind of stuff is pretty useful when you are TRYING to get pregnant. However, it is not something to rely on in order to AVOID getting pregnant. Also, if your partner is at all irregular much of this goes out-the-window.