To achieve a net reproduction rate (NRR) of 1, the couple protection rate (CPR) should be:: (A) 20%, (B) 30%, (C) 40%, (D) 60%
Answer is D. 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%