Sex Q&A

The principle of safety period is to refrain from sexual intercourse during ovulation period when a woman is most fertile. The fertile period can be estimated by the calendar method, charting daily basal body temperature, or detecting changes in cervical mucus. Ovulation usually occurs 14 days before the onset of the next menstruation. However, since the menstrual cycle is not always regular, the user needs careful and persistent charting for a long period in order to predict the fertile period. The various method for estimating the fertile period require careful instruction and it is best to consult a doctor if you plan to use this method for contraception.

Normally when a woman ovulates, her basal body temperature (taken first thing in the morning before getting out of bed) will rise between 0.4 to 0.8 degree celsius.