In September 2010, Zuckerberg invited Chan, by then a medical student at the University of California, San Francisco,[135] to move into his rented Palo Alto house. Zuckerberg studied Mandarin in preparation for the couple's visit to the People's Republic of China in December 2010.[136][137] On May 19, 2012, Zuckerberg and Chan married in Zuckerberg's backyard in an event that also celebrated her graduation from medical school.[138][139][140] On July 31, 2015, Zuckerberg announced that he and Chan were expecting a baby girl. He stated that he felt confident that the risk of miscarrying was low so far into the pregnancy, after having already suffered three miscarriages.