In << Battle Through the Heavens >>, Yao Lao did not take any pregnancy medicine. Yao Lao's original name was Yao Chen. He was the master of the main character of 'Fight Through the Heavens,' Xiao Yan. In the novel, Yao Lao's soul was damaged due to his disciple Han Feng's betrayal, and he fell into a deep slumber. In order to save Yao Lao, Xiao Yan had gone through many hardships before finally finding a medicinal pill called the 'Nine Revolutions Soul Returning Pill', which successfully revived Yao Lao. In the novel, there was no mention that the Drug Lord had taken pregnancy medicine, nor was there any plot that suggested that the Drug Lord was related to pregnancy medicine. Therefore, there is no answer to your question in the novel. Hurry up and click on the link below to return to the super classic original work," Battle Through the Heavens "!