Calendar for determining "safe period"

ABSTRACT

A table is given showing the comparative failure rate of the various methods of contraception. The safe period method compares favourably with other well-recognised and established methods. A disadvantage in the use of the safe period method is the calculations involved monthly. To obviate this disadvantage a ready-reference calendar has been devised and described. In addition to its use for contraceptive purposes the calendar may also be used by couples desiring children to indicate the dates of highest fertility.