Yang Yuhuan, the noble consort of Tang Emperor Xuanzong, was praised as one of the "Four Great Beauties". However, despite her deep love from the emperor, she never gave birth. Why is that? The following three reasons are most likely.

Firstly, it may be due to her physical condition. According to historical records, Yang Yuhuan suffered from lung disease, which may have affected her fertility under the medical conditions of that time. In addition, her plump body may have also led to difficulties in giving birth.

Secondly, it may be due to psychological pressure. Although Yang Yuhuan had a prominent status, she also faced tremendous pressure. She needed to maintain her beauty and charm to sustain the emperor's affection. This pressure may have affected her physical and mental health, thus affecting her fertility.

Lastly, it may be due to court intrigues. In the palace, the struggle among concubines was fierce. To secure their own status, they may have resorted to various means, including using medicine to prevent other concubines from giving birth. Therefore, it is also possible that Yang Yuhuan was poisoned by other concubines, leading to her infertility.

All three reasons could have led to Yang Yuhuan's infertility. However, due to the limitations of historical records, we cannot determine the specific cause. Nevertheless, Yang Yuhuan's infertility had a profound impact on her life and the history of the Tang Dynasty.

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