original: A change to this law had been considered until Princess Kiko gave birth to a son.
simplifications: This law was going to be changed before Princess Kiko gave birth to a son. After Princess Kiko had a son, the law change wasn't considered anymore. A change to this law had been considered. It wasn't considered after Princess Kiko gave birth to a son. A change to this law was an option until Princess Kiko had a son. They considered changing this law until Princess Kiko had a son. They were considering changing the law until the princess gave birth to a son. Changing this law was thought about until Princess Kiko gave birth to a son. A change to this law was considered until Princess Kiko gave birth to a son. A switch to this law were viewed once Princess Kiko had gave birth to a son. A change to this law had been given a thought until Princess Kiko gave birth to a son.