In general, for women in their forties, it is more appropriate to have sex once every 3 to 4 days. But the exact time varies from person to person. For women in their forties, the body’s secretion function begins to initially decline, estrogen secretion is reduced, the libido has also been reduced. If you are in good physical condition, it is more appropriate to have sex once every 3 to 4 days. If for the poor physical condition, there are chronic underlying diseases of the female population, it is recommended to have sex once a week is more suitable, because too frequent sex will lead to adverse consequences, and also pay attention to sexual life, do not be too intense. For women in their forties, it is recommended to go to the hospital for a comprehensive physical examination before consulting a professional doctor to see how often it is appropriate to have sex once.