phylacto-, phylact-, phylac-, phylax-

1. A transfusion of blood from a donor who has been immunized by injections of an antigen prepared from microorganisms isolated from the recipient; the recipient then gains passive immunity from the antibodies formed in the donor.
2. Transfusion of blood from a donor previously rendered immune to the disease affecting the recipient.

Removal of one or both breasts without the current presence of cancer.

This surgery is sometimes chosen as a preventive measure by women who have a strong family history of breast cancer.

Mental hygiene which is said to develop "healthy emotions, attitudes, and behaviors and is free from emotional stress and mental illness."

Preparation for childbirth with mental and physical training of the mother for delivery. The goals of the preparation include the elimination of the fear of pain and the expectation that a healthy child will be born.

1. A natural childbirth technique in which psychological preparation is used to condition the patient and diminish perception of pain.
2. Psychotherapy directed toward the prevention of emotional disorders and the maintenance of mental health.