Having children may reduce the risk of heart disease A new study shows that women who give birth to more than 4 children are less likely to experience heart disease at older ages. The results of previous studies that addressed the subject are conflicting and inconclusive, some suggested that pregnancy and birth may increase the risk for heart attacks and strokes, others proved otherwise. The new study began in the mid-eighties of the last century, which included more than 1300 women, aged over fifty years, and in most of them belonging to the middle class of society, in the region of Southern California in the United States of America. Asked in the study to give sufficient information on the dates reproductive them, in terms of number of pregnancies that lasted for more than 3 months and number of children present and other information about their use of contraceptives containing estrogen and the symptoms and time of interruption of their periods, as identify the factors that increase the risk of heart disease in each post separately, and the average number of children at posts in the study is two children. The study lasted for two decades, during which he died almost half posts for reasons related to heart disease or strokes, but the incidence of these diseases were lower in women who have given birth to 4 children or more compared with women who did not give birth at all. Scientists did not reach at the moment how to protect the process of pregnancy and reproduction of heart disease or strokes, but believed that the body is exposed to the hormone estrogen which is secreted during pregnancy helps protect the heart. On the other hand, commented other scientists on the results of the study that they were not accurate in that it included a specific category of society is a class of the middle class in the state of California, which has usually healthier and exercising, when women are healthy habits better, such as to maintain the weight and stay away smoking and exercise and other habits that help strengthen and protect the heart and arteries, more than the minimum class of society, or women in the cities or even other countries, which means the inability to present the results.