Extended triphasic contraceptive regimens

摘要

Disclosed is a method of contraception comprising: administering to a female of childbearing age a combination of an estrogen and a progestin for at least 42 consecutive days followed by a honnone-free period of from 4 to 8 days, said estrogen and progestin being administered in a contraceptively effective daily dosage for a sequence of at least two cycles of at least 21 days, wherein the estrogen dosage remains constant over each cycle and the progestin dosage increases in three phases over each day cycle.