(CNN) -- A teacher at a Catholic school in Indiana is suing the diocese where she worked after being fired because the in vitro fertilization treatments she received were considered against church teachings.

Emily Herx, a former English teacher at St. Vincent de Paul School in Fort Wayne, filed a federal lawsuit against the school and the Diocese of Fort Wayne-South Bend.

She says in the suit filed Friday that she was discriminated against in 2011 after the school's pastor found out that she had begun treatments with a fertility doctor, according to the complaint.