ovulation occurs 14 days before the onset of the next menstruation. The rhythm method is the most commonly used of the natural methods. To be used successfully a record should be kept for at least six menstrual cycles. The fertile period is then defined by a set of rules for example: The length of the shortest cycle less 18 days marking the start of the fertile period and the length of the longest cycle less 11 days marking the end of the fertile period. This is the only birth control method that has received the Catholic Church’s seal of approval. The next natural way of avoiding the use of contraceptives is called the Basal body temperature method. In a normal, ovulatory cycle the temperature of the body measured on awakening, called the basal
ovulation occurs 14 days before the onset of the next menstruation. The rhythm method is the most commonly used of the natural methods. To be used successfully a record should be kept for at least six menstrual cycles. The fertile period is then defined by a set of rules for example: The length of the shortest cycle less 18 days marking the start of the fertile period and the length of the longest cycle less 11 days marking the end of the fertile period. This is the only birth control method that has received the Catholic Church’s seal of approval. The next natural way of avoiding the use of contraceptives is called the Basal body temperature method. In a normal, ovulatory cycle the temperature of the body measured on awakening, called the basal