The family planning centers shall furnish educational materials and information with respect to achieving a planned parenthood, including advice as to contraceptive practices, medical surgery devices and pharmaceuticals. These centers are authorized to carry out clinical activities incident to child spacing, including medical examinations, insertion of contraceptive devices, prescription of pharmaceuticals, and may furnish drugs and devices to eligible persons. The family planning centers shall be under the direction of a physician, licensed by the State of Oklahoma to practice medicine.