Did the ancient emperor have twin sons?

1, the most famous emperor with twins is, the eldest brother is Li, and the fourth is Li Yuanji. In fact, there is a third one, Li Yuanba, who was Li Shimin's twin brother but died young, so Li Yuanji is generally called the third one. However, due to the unknown historical records, there are many controversies at present, because the historical records record that Li Yuanba Li Xuan was sixteen when he died, and Li Shimin was sixteen, so they were twins.

2. Other famous royal twins are: Wu Zetian, who gave birth to twins, and her youngest daughter died young. Gao Huan's wife, Lou Zhaojun, also gave birth to twins. However, due to the poor medical conditions in ancient times and the low survival rate of twins, royal twins were inevitable. The most important thing is the influence of feudal superstition at that time, which believed that it was unlucky to have twins, and generally left one or died directly. Another reason was the poor medical conditions at that time.