古人是主张晚婚的,认为男女双方要等到完全发育成熟才能结婚,并且把晚婚和养生保健及优生优育联系起来。长沙马王堆三号汉墓出土的竹简《十问》中就指出:“竣(朘)气不成,不能繁生。”“朘”指男子阴茎,性器官尚未发育成熟,性机能不健全,就不可能繁衍健壮的后代。《礼记·内则》写首:“男子二十而冠,始学礼……三十而有室,始理男事。”女子“十有五年而笄,二十而嫁……”这就是说,男子二十岁开始戴上成年人的帽子,注意学习礼仪;到了三十岁时,身体状况好,可以结婚有妻室。女子十五岁要插上发笄即簪子,这叫“及笄”,等到二十岁才能出嫁。之所以提倡男子三十岁娶亲,女子 The ancients advocated late marriage, that both men and women to wait until fully mature to get married, and the late marriage and health care and eugenics linked. In the bamboo slips unearthed at the 3rd Han Tombs in Mawangdui, Changsha, it was pointed out in the “Ten Questions” that “if you do not have gas, you will not be able to flourish.” “Xiu” refers to men’s penis. Sexual organs are not yet mature and sexual function is not perfect. Probably a robust offspring. “Book of Rites in the” wrote the first: “Men twentieth crown, the beginning of the ceremony ... ... Thirty and have room, start managing men.” Women “ten years and ten, twenty married ... ...” This means that when a man is twenty years old, he begins to wear an adult hat, paying attention to learning etiquette; by the age of thirty, he is in good health and can marry and have a wife and children. At the age of fifteen, a woman has to insert a hairpin called a hairpin. It is called “笄 及” and can not marry until she is twenty years old. The reason men and women to marry a man thirty years old