er, maternal grandmother, daughter, sister, or maternal aunts have had breast cancer, and the risk is still higher if several relatives have had the disease(8). A woman who has had a full-term baby by age 20 apparently develops a strong protection(2,8,9). Formerly, breastfeeding was believed to offer some prophylaxis against breast cancer, but this has not proved true(2). Some experimental evidence suggests that a diet high in animal fats may play a significant role in the