This question is unclear. "Xo" is not a standard abbreviation for a character on Grey's Anatomy. However, based on the provided reference that mentions Jo Wilson getting pregnant in Season 20 of Grey's Anatomy, it is possible that "Xo" is a typo, or a nickname not familiar to me. Therefore, I will assume the question refers to Jo Wilson and answer accordingly.
Jo Wilson gets pregnant in Season 20 of Grey's Anatomy.
After fainting in the season finale, Jo learned she was pregnant with Link's child after taking tests.
