Moreover, in ancient times, they all got married earlier. Girls are all married around 17 years old, and even most of them are married before 17 years old, otherwise their parents will be arrested and accused. So, for example, in ancient times, some people in their 10 s may have married and had children. In ancient times, there were relatively few population problems, and basically there were many young people. However, after a war, the youth labor force will be greatly reduced. After the total war, the people will be allowed to cultivate themselves. If some don't have children, they may pay money as a punishment, so most families still choose to have children, and some contraceptive conditions at that time were not as developed as they are now, which made it easy for women to have children.
In the Tang dynasty, if you had a child, you would even be given more than 0/00 mu of land, and the conditions were very rich. China has been an agricultural country since ancient times, and land is very important to the people. Therefore, most farmers are still happy to have children to get these benefits. In ancient times, it was very happy to have children and grandchildren. It can be said that having a baby is something that the whole family is happy to do.
Moreover, three wives and four concubines were allowed in ancient times, and the chances of having children were very high. These policies have also increased the chances of bearing children. Unlike our family planning and monogamy, each family has at most two or three children. In ancient times, it was normal to have five or six or three or four children. There were many family brothers in ancient times, unlike many families who were only children.