Scully was pronounced infertile during the fifth season. In the season five episode "Emily", Scully discovers that she unknowingly mothered a daughter during her abduction (in season 2). Her daughter Emily was adopted by another family. Emily died shortly afterwards, and they were unable to further investigate after Emily's body went missing. In the seventh season finale, "Requiem", Scully mysteriously became pregnant. The child, named William, after her own father, as well as Mulder's father, was born at the end of the eighth season. The show did not initially reveal the cause of Scully's pregnancy, but later episodes and movies would see Mulder and Scully call William "our son"; the pair had unsuccessfully tried for a child through in vitro fertilization. Around this time, Mulder was fired from the FBI by Deputy Director Alvin Kersh, and Scully left the field to teach forensics at Quantico. William was given up for adoption during the end of the ninth season after Scully felt she could no longer provide the safety that William needed. William was a "miracle child", of some importance to the alien conspirators. He demonstrated extraordinary powers, including telekinesis.