Sarg 89 - Il has a Son - Pururavaa 

Then Budh sent all those women with Kinnaree form and then said to Ilaa - "O beautiful, I am Chandramaa's son Budh. You enjoy with me as my wife. Ilaa found herself in a lonely place so she accepted his offer and Budh used to live with her. Thus Chaitra Maas passed in a moment and at the end of the month, Il woke up on the bed instead of Ilaa. He found a Tapaswee nearby in the water raising his hand and doing Tapasyaa. 

He said to him - "Hey Tapaswee, I came with my soldiers. I don't know where have they gone." As Budh knew about his Shaap, that he had no remembrance of his being woman, so he said to Il - "Hey Raajan, There was a heavy hail storm, so all soldiers were killed in that storm and you slept in my Aashram frightened with storm. But now you need not to be frightened, you may stay back here in my Aashram and eat fruits and flowers.

Raajaa Il said - "Hey Tapaswee, Now I will go to my kingdom, and see my wife and children. If I will not go now then my eldest son Shashbindu will become the king, that is why I cannot stay here any more." But Brahm Gyaanee Budh managed to keep him there for one year. For one month he used to enjoy living with Budh and next month he used to do religious activities. In the ninth month, Ilaa gave birth to a son. Ilaa gave that son to Budh. He got known as Pururavaa. Thus Raajaa Il passed one year as woman for one month and as man for another month in enjoyment and religious discourses.

Sarg 90 - Later Life of Raaja Il 

Hearing this wonderful story of the birth of the son of Ilaa, Lakshman and Bharat said - "Please tell us the story of his later years." Raam said - "After one year has passed, when Raajaa Il became the male, then Budh called Rishi Chyavan, Durvaasaa, Samvart etc and asked the solution of Il's problem.

While Budh was consulting these Muni, Pulastya Muni and Kardam Rishi also came with Balatkaar and Omkaar Muni. Kardam Rishi said - "Hey Munivar, There is no hope for his good, until Bhagvaan Shankar is happy so we should do an Ashwamedh Yagya to please Shankar Jee to do good for him." All Muni supported this and the Ashwamedh Yagya was done nearby Budh's Aashram. At the end of the Yagya, Shankar Jee said - "Hey Rishi, I am very happy with your Bhakti and Ashwamedh Yagya. What good should I do for Il?" Muni said - "Hey Prabhu, Return his manhood for ever, this is our wish." Mahaadev Jee fulfilled their wish and disappeared. All Rishi went to their places and Raajaa Il started ruling the kingdom by habiting a city named Pratishthaa.