<P> In `` 200 '' , it was revealed that JJ 's transfer was a backstop and that she was actually put on a task force in the Middle East with Mateo Cruz ( who later became the section chief of the BAU following Strauss 's death ) . During this time , she witnessed a mission she had pushed for fail and discovered one of the task force 's informants dead . In February 2011 , while overseas , she discovered that she was pregnant . However , in April 2011 , following the events of `` Lauren '' , during an attack on the task force , she was wounded and miscarried the baby . She did n't initially tell Will of the pregnancy , and it remained a secret between her and Cruz . In `` The Forever People '' , when she starts showing signs of PTSD , Reid calls her on it , and he tries to help her and talk to her . She eventually admits she had a miscarriage due to the attack on her convoy , and asks him to keep it between them . </P>
criminal minds what episode does jj find out she pregnant
in April 2011