Measuring the effectiveness of contraceptive marketing programs: Preethi in Sri Lanka.

The Preethi marketing program resulted in sales of more than 11 million condoms during its first 33 months, multiplying Sri Lanka's annual per capita condom use by a factor of five. Estimates for 1974 show 144,000 new acceptors (8% of married women of reproductive age), totaling 50,000 couple-years of protection. It is also estimated that more than half of the nation's 1.8 million couples of childbearing age were educated about the function of a condom. Unit costs were low for this new, nationwide program: about US $2.00 for each new acceptor; 6.00 dollars for each couple-year of protection; and 0.09 dollars for each couple educated. The program's success suggests that a social marketing approach can advance family planning at a relatively low cost.