Patent 4006227 Issued on February 1, 1977. Estimated Expiration Date: February 1, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
A pharmaceutical composition obtainable by extraction from Montanoa tomentosa is useful for controlling fertility in female mammals. By internal administration of an effective luteolytic amount of the herbal product, blood levels of progesterone can be controlled and in the case of female humans and other primates such as monkeys, menses may be induced. Antiimplantation or pregnancy termination methods may be utilized for humans and lower animals. Biologically synchronized and controlled fertility techniques permit members of a mammalian group to become fertile in a close time period for reducing the time span in which newborn animals, such as sheep, are delivered.
colin, J.A.P.A., vol. 18 (1929), pp. 876-880
Martinez, Las Plantas Medicinales de Mexico (1944), pp. 331 to 338