Abstract

PIP: Scientists from the Salk Institute and the University of California will soon test the use of a once-a-month antifertility drug on women. Composed of peptides, the antifertility agents antagonize the normal action of luteinizing hormone-releasing factors (LRF), inhibiting the secretion of luteinizing hormone (LH) by the pituitary. Administration should begin within the first 10 days of the menstrual cycle to be effective.