To achieve a net reproduction rate (NRR) of 1, the couple protection rate (CPR) should be:

Ref. Foundations of Community medicine. Page. 113   Couple Protection Rate (CPR) • It is an indicator of the prevalence of contraceptive practice in the community • Definition: the percentage of eligible couples effectively protected against childbirth by one or the other approved methods of family planning – Sterilization – IUD – Condom – OCP’s • NRR = 1 can be achieved only if the CPR > 60%