姑娘应受到鼓励去进行剧烈的运动来推迟月经初潮的时间,这可以使她们在以后的生活中免受乳腺癌和其它疾病的折磨.在小学就进行剧烈运动的女孩,常比不进行体育锻炼的女孩月经初潮来得晚些;如果她们在青春期到来后仍然经常锻炼,也会出现月经不调的现象。月经初潮推迟和月经不调常被人们认为是不正常的,许多专家现在 Girls should be encouraged to carry out strenuous exercise to postpone the menarche, which will allow them to be protected from breast cancer and other illnesses in later life. "Girls who do strenuous exercise in primary school are often better than those who do not exercise Of girls came later than the menarche; irregular menstruation may also occur if they are still exercising regularly after puberty. Postponement of menarche and irregular menstruation are often considered abnormal and many experts nowadays