Serena_logo The Sympto-Thermal Method

Young confident woman
A Natural Method of Achieving or Avoiding Pregnancy


  • Natural, safe, and effective from puberty to menopause
  • Easy to use (less than five minutes a day!)
  • Accredited teacher-couples instruct couples in the sympto-thermal method
  • Learn to chart daily observations of the woman’s basal body temperature, cervical mucus signs, changes in the cervix, and peri-ovulatory symptoms
  • Works in harmony with and respects the woman’s natural reproductive cycle to determine the relatively infertile, probably fertile, and definitely infertile phases of the menstrual cycle
  • Allows the couple to accurately determine their fertility as they jointly decide how to exercise responsible parenthood each cycle
  • No harmful side effects
    Economical – with a one-time registration fee, Serena BC will support couples with their lifelong family planning needs including after childbirth, peri-menopause, and menopause
  • Because we don’t want finances to ever prevent a couple from learning the STM, Serena BC is happy to work out payment arrangements
  • Safe to use while breastfeeding
  • Highly effective, even for long or irregular cycles
  • Useful in uncovering possible causes of infertility, including anovulatory episodes and irregular menstrual patterns
  • Serena Canada’s medical advisor Dr. Suzanne Parenteau-Carreau is an internationally respected fertility researcher
  • At Serena Canada we review scientific research constantly to develop and refine the method
  • Since Serena Canada was founded nearly 60 years ago, the non-profit organization has conducted research on thousands of women’s menstrual cycles and reproductive histories as well as breastfeeding and menopausal experiences

For more information, visit the Serena BC website. Serena BC teaches the sympto-thermal method of natural family planning (also known as the double-check method).

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