Observations made at the Family Planning Clinic and a review of the literature show that there is no increased tendency towards the natural contraceptive method among advice-seeking couples. On the contrary-apart from a few exceptions-the most effective method is always chosen. The natural method presupposes a high degree of motivation, of readiness to communicate and of clarification. These prerequisites underly the relatively high rate of failure because not all couples have the right degree of understanding. Nevertheless, to many people this method is the only acceptable and morally justifiable one. Thus, precise and detailed instructions and frequent check-ups would be necessary especially during the first few months, until adequate experience is gained.