[luisa]

Check out www.tcoyf.com I read this book when I was planning to get pregnant and it explained how to understand your cycle and predict when you ovulate using the basal temperature, cervical position and cervical fluid. Your waking temperature is low when your estrogen levels are high during the first half of your cycle and once you ovulate the estrogen levels drop, the progesterone levels increase and your body basal temperature also increases. If the egg released during ovulation is not fertilised, the hormon levels drop and you get your period. Charting is great for NBE if you want to stop taking PM or herbs just before you ovulate and it can also help to see if you have a hormonal imbalance. Charting can be used as birth control since you are not fertile every day of the cycle. By the way, it is also possible to have unovulatory cycles especially if you have just come off a birth control pill.