[Directions for classification and indications of oral contraceptives (author's transl)]. / Hinweise zur Klassifikation und Indikation oraler Kontrazeptiva.

PIP: A method for classifying oral contraceptives based on functional criteria is described. Contraceptive preparations are classified according to the hormonal differences between the normal menstrual cycle and the cycle under hormonal treatment. These differences may be expressed as an "aberration index" based on temporal and hormonal differences between the normal and hormone-treated cycles. This index is calculated for seven common progestins, and use of the index values in prescribing contraceptives for women of specified physiological types is explained.^ieng