Following the advice of the Dutch National Health Council, a national screening program for breast cancer was started in 1990 in the Netherlands. All women aged 50-70 will be invited for screening by mammography in fixed or (semi)mobile screening units every 2 years. The role of the general practitioner in screening for breast cancer is described in the Dutch protocol (Standard) published in 1990 by the Dutch College of General Practitioners. Because of the role of the general practitioner/family doctor as a gatekeeper and because of the list system, every Dutch woman is known by her own general practitioner. In any given year the general practitioner will see 70% of his population. So the general practitioner is in the position to play an important role in practice and patient-centered support of breast cancer screening. The general practitioner also has an important role in the support of women with positive results. The general practitioner receives the "abnormal" results and has to explain to the woman what this means and what further investigations are necessary. There are teaching programs on screening for breast cancer for the vocational training of general practitioners and for postgraduate training.