[MUSIC] Welcome to Understanding China, 1700 to 2000, A Data Analytic Approach. Part two, section nine, Reproduction and Conscious Choice. Now in the absence of contraception, the late starting, early stopping, and long spacing of Chinese parents in late imperial China, which caused such a difference in Chinese marital fertility, reflects differences fundamentally in marital passion. And the frequency of coitus within marriage. In China, the primary familial relationship was not between husband and wife, but between parent and child. And Chinese parents discouraged sexual passion traditionally, and encouraged moderation as filiality was more important to the family than fecundity. Chinese couples therefore frequently delayed marital consumption. While in contrast, European marriages may even have required consumption to legitimize marriage. Indeed, the Chinese believed that controlling sexual passion was generally beneficial to traditional Chinese health culture. For over two millenia, Chinese medical texts advocated that such relations be restricted to three times a month for young adults, twice a month for middle aged adults, and once a month, at most, for the elderly. This prescription dates back to Dong Zhongshu, a famous Confucian scholar, who wrote, and I quote, gentlemen should discipline their bodies and dare not defy nature. Young men should only indulge in relations once every 10 days. Middle aged men once every 20 days. Younger old men once every 40 days. Older men once every 80 days. Very old men, 60, only once every ten months. In other words, the study of historical Chinese reproduction, just as the study of historical Chinese mortality, provides new insight not just into population behavior, but into different concepts of who we are and how we should behave. In Europe, consequentially, the time between marriage and first birth was typically just 15 months. Whereas, according to the best documented historical populations, the Qing imperial nobility, the gap in the early 19th century between father's first age at marriage, 21 years of age. And father's age at first birth, 24 years of age, was three years, over double the gap between marriage and first birth in Europe. Even in the 1950s, the mean interval on average between marriage and first birth in China, overall, was 34 months at the national level. And up to 40 months in selected rural populations. Among the Qing imperial nobility, you can also see couples also stopped early. The mean age at last birth was only at 34 for monogamous wives, slightly higher for polygynous wives. And interestingly, the equivalent age among peasant wives in northeast China was remarkably similar, 33.5 years of age. In contrast, the mean age at last birth in historical Europe, the dotted line on the figure, was 40 years of age. In consequence, at every age, the proportion of couples subsequently infertile was much higher in China than historical Europe. And the gap between the Chinese and European populations in the accompanying figure is extremely wide, especially after age 45. Moreover, were we to compare non-contracepting populations in China and Europe, birth intervals were much longer in China than in Europe. In pretransition European populations, the interval between first and second birth was 28 months for England, 23 months for France, 21 months for Germany. In rural China, even in the mid-20th century, mean birth intervals were as late as 39 months between the first and the second birth, 37 months between the second and third. Resulting again in much lower marital fertility in China than in Europe. [MUSIC]