The development of new contraceptives is an indispensable adjunct to the solution of the world wide problems related to the explosive population growth. It is generally agreed that an optimum ratio should be present between the progestogen and the oestrogen part of any pill. Lowering too much the oestrogen will lead to ovulation escapes. Lowering of the progestogen part is supposed to lower the side effects and leads to a commercially cheap preparation. The present report presents our experience with a new preparation combining 1 mg. of Lynestrenol and. 0.1 mg. of Mestranol per tablet.