Ex-gay ministry:   

This is a ministry devoted to bringing about change in
orientation for those who are unhappy in their orientation.

Examples would be Exodus, Narth, One by One Ministries.

These ministries usually use some form of psychotherapy
sometimes called reparative therapy.

Reparative therapy is NOT recognized as valid by any
professional mental health organizations.

I do not support nor encourage people to look
to these ministries for answers.